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Nutritionist Formulated. Vet Approved.
Block
8 reviewsFrom: £21.60 every 60 days
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In stock, ready to ship Expected Delivery 3 days
Free from common allergens:
Chicken, beef, wheat, corn and soy. Gentle on sensitive dogs.
- Pre, Pro & Postbiotic 23 targeted bioactives on the Biotics Triad of prebiotics, probiotics and postbiotics.
- Gut-Skin Comfortable skin starts in the gut.
Allergy Relief · Skin and Coat Support for Sensitive Dogs
Comfortable skin starts in the gut. Block builds 23 targeted bioactives on the Biotics Triad of prebiotics, probiotics and postbiotics, including quercetin-rich botanicals, GLA-rich oils and vitamin D3, to support a calm skin response, a strong skin barrier and a glossy coat, day after day.
Made without meat, wheat, soy or corn, Block is gentle enough for sensitive dogs to take every day, with every ingredient and inclusion level declared in full.
One Gut. Whole Dog.™
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Vet-Approved
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My moms dog walks better now, he feels better and he walks like a puppy again after 10 years.
Schnell und unkompliziert
EXCELENTE 100% RECOMENDADO
One of our dogs likes them very much and seems to show fewer signs of allergy. Our other dog does not accept the bioactive bites.
I hoped these would work but so far they have not. My dog is allergic to all sorts of things and I hoped these may help but unfortunately not. I am going to put her back on apoquel (which I don’t like & is expensive) as this seems to be the only things that helps (along with frequent washing her paws and chin with hibiscrub.) I will carry on until the end of the supply I have as it could take a couple of months to work but as of now I can’t recommend them as they don’t work on my Frenchie.
I do not see any improvement yet. I was told it can take few weeks to notice it, so I wait and will see.
Description
Block is the skin and coat chew in the Supplements functional supplement range: a daily soft chew built on the Biotics Triad of prebiotics, probiotics and postbiotics, then layered with quercetin-rich botanicals, GLA-rich oils and vitamin D3 that work through the gut-skin axis. It is formulated to support a calm skin response, a strong skin barrier and a balanced immune response for dogs prone to itching and sensitive skin. Made without meat, wheat, soy or corn.
Block is formulated to support:
- A calm, comfortable skin response
- A strong skin barrier and natural moisture balance
- Coat condition and shine
- A balanced, well-regulated immune response
- A balanced, diverse gut microbiome
- The gut barrier and intestinal lining
- A healthy inflammatory response
Ingredients
23 targeted bioactives, led by the quercetin-rich botanicals Sophora japonica, stinging nettle and cranberry, the GLA-rich oils of evening primrose and borage, and vitamin D3, built on two postbiotics (TruPet™ and Lactobacillus helveticus HA-122), the Calsporin® probiotic and Biolex® MB40 and Fibrofos™ 60 prebiotic fibres, with DHAgold™ algae and supporting vitamins, minerals and botanicals. Every ingredient and inclusion level is listed in full below.
Cold Extrusion Benefits
Heat is the enemy of many of the actives that make a supplement worth giving, so every Bioactive Bite is cold-extruded, shaped at a gentle 38°C, close to a dog's own body temperature.
Why the gentle process matters:
- Prebiotic fibres stay whole. Fructo-oligosaccharides such as those in Fibrofos™ 60 are broken down by high heat, which splits the fibre into simple sugars and reduces its prebiotic value, so a gentle process helps keep them intact.
- Delicate oils stay intact. Fragile fats like the DHA in DHAgold™ and the GLA in evening primrose and borage oils oxidise and lose their value when heated, so a low temperature helps protect them.
- Vitamins and antioxidants are preserved. Heat-sensitive nutrients such as natural vitamin E and vitamin C hold their potency rather than being cooked off.
- Botanicals keep their activity. Delicate compounds, including the flavonoids in Sophora japonica, nettle and green tea and the volatile actives in turmeric and cinnamon, are easily degraded by heat.
- Declared levels are protected. A gentle process means far less is lost in the making, so the inclusion levels on the pack are protected through manufacture.
In short, cold extrusion is how a carefully designed formula still delivers once it is in the bowl.
Health and Happiness Guarantee
Your dog's health and happiness is our number one priority. If your dog doesn't take to their Bites, or you're not completely happy for any reason, you get your money back, no quibbles, with no need to return anything: simply donate any unwanted Bites to a friend or a nearby animal shelter. You can read the full terms on our Health & Happiness Guarantee page.
Shipping Info
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Subscribe & Save delivers on the schedule shown, and you can pause, change or cancel anytime.
Return Policy
Returns and exchanges are handled under our Health and Happiness Guarantee.
Read the Health and Happiness Guarantee
Questions about a return? Contact us
How Our Subscription Works
How does it Work?
When you sign up, your renewal period will automatically calculate depending on the daily dose required, determined by the dog’s weight you selected when ordering.
What’s the Benefit of a Subscription?
Subscribing for your dog’s supplements means you won’t need to think about reordering each time, you can relax knowing a new packet of chews will conveniently arrive just when you need them. Of course, you get to enjoy 10% discount off the regular price too.
Is it flexible, or am I bound by a Contract?
Your subscription to Bonza Supplements is a commitment-free, rolling subscription plan. A simple click in your account dashboard gives you complete control over every aspect – cancel, pause, or change deliveries – at any time.
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When Your Dog's Skin Never Gets a Break
It rarely starts with a crisis. It is the paw licking in the evening, the scratching that wakes you at night, the ears they keep rubbing and the patch of coat that never quite grows back. When your dog's skin is uncomfortable, their whole day revolves around it, and so does yours.
Skin that stays sensitive often has roots below the surface. The skin and the gut are in constant conversation along the gut-skin axis: around 70% of the immune system resides in the gut, and a gut that is out of balance can leave the immune system quicker to overreact and the skin barrier less able to hold its own. Seasonal pollens, dust, food and everyday surroundings then find an easier way in.
Block is designed to support skin from the inside out.
Not to mask signs with a quick fix, but to support the skin barrier, a balanced immune response and the gut that underpins them both.
What Block Supports
Six Ways Block Supports Your Dog's Skin and Coat
Each benefit connects back to the gut, because comfortable skin is built from the inside out.
Skin Comfort
Quercetin-rich botanicals support a calm, comfortable skin response for dogs prone to itching.
The science
Sophora japonica (18.75mg), stinging nettle (11.25mg) and cranberry (30mg) provide quercetin and related flavonoids, plant compounds studied for their role in stabilising mast cells, the immune cells that release histamine.
For the evidence, see natural antihistamines for dogsSkin Barrier Support
GLA-rich oils, zinc and natural vitamin E support a strong skin barrier and natural moisture balance.
The science
Evening primrose oil (45mg) and borage oil (30mg) supply gamma-linolenic acid (GLA), an Omega-6 fatty acid the skin uses to maintain its barrier lipids, alongside zinc (11.25mg) and natural vitamin E (6mg).
For the evidence, see Omega-6 for dogsCoat Condition
Algae-sourced Omega-3 and zinc support supple skin and a glossy, healthy-looking coat.
The science
DHAgold™ algae (30mg) supplies long-chain Omega-3 (DHA), and zinc in its chelated glycine form supports skin and coat quality, as studied in dogs.
For the evidence, see the dog skin microbiomeBalanced Immune Response
Around 70% of immune tissue sits in the gut. Postbiotics and vitamin D3 support a proportionate, well-regulated immune response.
The science
Two postbiotics, TruPet™ (150mg) and Lactobacillus helveticus HA-122, alongside vitamin D3 (101.25 IU per chew), interact with the gut-associated immune tissue that shapes how the body responds to everyday environmental triggers.
For the evidence, see the gut-immune axisGut-Skin Axis Support
A balanced gut and a well-supported gut lining are the foundation of healthy, resilient skin.
The science
Fibrofos™ 60 and Biolex® MB40 feed beneficial bacteria, Calsporin® adds a studied spore-forming strain, and L-Glutamine (48.75mg per chew) and clinoptilolite (69.13mg) support the gut lining and the natural clearance of unwanted compounds.
For the evidence, see the gut-skin axisHealthy Inflammatory Response
Botanicals such as turmeric, chamomile and green tea support a healthy inflammatory response in the skin.
The science
Turmeric (providing curcumin, with black pepper extract to aid absorption), chamomile and green tea are traditionally used to support a healthy inflammatory response, while milk thistle supports the liver, which processes much of what the gut absorbs.
For the evidence, see skin inflammation in dogsHow Block Works
The Science Behind Block
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Feed & Populate
Prebiotic fibres, Fibrofos™ 60 and Biolex® MB40, feed the beneficial bacteria already living in your dog's gut, while Calsporin® (Bacillus velezensis DSM 15544), a studied spore-forming probiotic, survives digestive transit to add more of them. The more good bacteria at work, and the more varied they are, the better supported your dog's microbiome, and that microbiome is the foundation healthy skin is built on.
Fibrofos™ 60 feeds beneficial bacteria · Calsporin® delivers 7.5 × 10⁸ CFU per chew
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Deliver the Postbiotics
Two named postbiotics, TruPet™ and Lactobacillus helveticus HA-122, deliver the beneficial compounds those bacteria produce. Those compounds feed the cells that line the gut wall, the thin, living barrier that sits between what your dog eats and the rest of their body. A well-nourished gut lining is what keeps everyday digestion settled, comfortable and resilient, which is why this layer matters as much as the bacteria themselves.
TruPet™ 150mg · L. helveticus HA-122 1.35 × 10⁹ cells
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Calm and Protect the Skin
Block then goes further for the skin itself. Sophora japonica, stinging nettle and cranberry provide quercetin-rich flavonoids, evening primrose and borage oils supply GLA for the skin barrier, vitamin D3 and the postbiotics support a balanced immune response, and turmeric, chamomile and green tea support a healthy inflammatory response. That is the gut-skin axis at work: care for the gut, and you care for the skin. One Gut. Whole Dog.™ is not just a name. It is how the body actually works.
Sophora japonica 18.75mg · Evening primrose oil 45mg · Borage oil 30mg · Vitamin D3 101.25 IU
See how the gut connects to the whole dog
Full Transparency
Inside This Formula
Gently made. Every Bite is cold-extruded at 38°C, close to body temperature, rather than the high heat of conventional processing, so the prebiotic fibres, oils and delicate bioactive compounds below are protected through manufacture.
Every ingredient named. Every dose declared. Every bioactive selected based on published research.
Inclusion levels per 3g chew
Postbiotics The compounds beneficial bacteria produce
TruPet™ Postbiotic
150mgSupports digestive balance, the gut barrier and a healthy immune response.
Clinical References
- Wilson et al. (2022) modulated circulating immune cells and oxidative stress markers in dogs
Lactobacillus helveticus HA-122
1.35 × 10⁹ cellsThe heat-inactivated (postbiotic) form of the probiotic Lactobacillus helveticus, delivering beneficial compounds to support gut and immune balance and working independently of live colonisation.
Clinical References
- Duysburgh et al. (2025) a blend containing HA-122 enriched beneficial bacteria in a canine gut model
- Deschamps et al. (2025) aided microbiota recovery after antibiotics in a canine gut model
- Nicolas et al. (2026) a chew blend containing HA-122 improved owner-rated digestive health in dogs with mild digestive signs, in an open 28-day study
Probiotic A live spore-forming strain
Calsporin® Probiotic
7.5 × 10⁸ CFUSpore-forming probiotic (Bacillus velezensis DSM 15544) that survives digestive transit and supports a balanced gut flora.
Clinical References
- de Lima et al. (2020) greater gut bacterial diversity in dogs
- Kahraman et al. (2023) higher faecal lactobacilli and digestibility in dogs
Prebiotics Fibres that feed the good bacteria
Biolex® MB40 MOS
149.1mgMannan-oligosaccharides that bind less desirable bacteria and support beneficial microflora.
Clinical References
- Ghyselinck et al. (2025) Biolex® MB40 fermented by gut bacteria from dogs with IBD helped protect a gut cell barrier, in vitro
Fibrofos™ 60 FOS
105mgPrebiotic fibre that feeds beneficial gut bacteria and supports a balanced microbiome.
Clinical References
- Swanson et al. (2002) FOS increased beneficial gut bacteria and lowered faecal ammonia in dogs
Quercetin Botanicals Plant sources of quercetin and related flavonoids
Sophora Japonica
18.75mgA botanical source of quercetin and rutin, flavonoids studied for their role in stabilising mast cells and supporting a calm skin response.
Clinical References
- Mlcek et al. (2016) review of quercetin and the anti-allergic immune response
- Jang et al. (2025) rutin reduced inflammatory responses in stimulated canine immune cells, in laboratory research
Stinging Nettle
11.25mgA traditional botanical for seasonal sensitivities, providing quercetin alongside other plant compounds.
Clinical References
- Roschek et al. (2009) nettle extract acted on histamine-related receptors and enzymes in vitro
Cranberry
30mgA source of polyphenols, including quercetin, with antioxidant properties.
Clinical References
- Prasad et al. (2025) review of cranberry polyphenols in animal health, including dogs
Skin Barrier Oils GLA and Omega-3 for the skin barrier and coat
Evening Primrose Oil
45mgA rich source of gamma-linolenic acid (GLA), an Omega-6 fatty acid the skin uses to maintain its barrier lipids.
Clinical References
- Scarff & Lloyd (1992) evening primrose oil reduced skin redness in 35 atopic dogs, in a double-blind, placebo-controlled crossover trial
Borage Oil
30mgOne of the most concentrated plant sources of GLA, supporting skin barrier function and coat condition.
Clinical References
- Harvey (1999) borage seed oil with fish oil studied in a placebo-controlled trial in atopic dogs
- Marchegiani et al. (2020) review of nutritional supplementation, including essential fatty acids, in canine skin disorders
DHAgold™ Dried Algae
30mgAn algae source of long-chain Omega-3 (DHA), supporting skin, coat and a healthy inflammatory response.
Clinical References
- Zhang et al. (2025) dried Schizochytrium algae and algal oil raised blood DHA and improved coat quality in dogs, in a 28-day study
- Souza et al. (2019) algae DHA improved diet digestibility and some immune cell measures in dogs
- Dahms et al. (2019) a Schizochytrium algal oil raised plasma DHA and EPA and was well tolerated in dogs through pregnancy and growth
Gut & Barrier Support For the cells and lining of the gut wall
Clinoptilolite
69.13mgNatural zeolite mineral that binds compounds in the digestive tract and supports the body's natural clearance.
Clinical References
- Kraljević Pavelić et al. (2018) review of clinoptilolite gut binding and detoxification in vivo
- Lowndes et al. (2018) clinoptilolite added to kibble gave firmer stools and less faecal odour in Beagles, in controlled feeding trials
L-Glutamine
48.75mgAmino acid that fuels intestinal cells and supports the gut lining.
Clinical References
- Rao & Samak (2012) supports intestinal tight-junction integrity
Zinc Chelate of Glycine Hydrate
11.25mgA chelated (glycine) form chosen for absorption. Zinc supports the gut-barrier lining, skin and a normal immune response.
Clinical References
- Marsh et al. (2000) zinc, especially with linoleic acid, improved coat gloss and skin barrier measures in dogs
- Pereira et al. (2021) review of zinc in dog health: organic forms such as amino acid chelates are generally considered more bioavailable, though results vary
Vitamins, Antioxidants & Botanicals Immune-supporting vitamins and plant compounds
Vitamin D3
101.25 IUSupports skin cell renewal and a balanced, well-regulated immune response.
Clinical References
- Klinger et al. (2018) vitamin D studied in a placebo-controlled trial in atopic dogs
Natural Vitamin E (RRR-Alpha-Tocopherol)
6mgThe natural-source form of vitamin E, more readily used by the body than synthetic dl-alpha-tocopherol. A fat-soluble antioxidant that helps protect the skin oils and cell membranes from oxidation.
Clinical References
- Jewell et al. (2024) an antioxidant blend including vitamin E improved antioxidant status and reduced DNA damage in dogs
- Shastak et al. (2026) review: natural RRR-alpha-tocopherol has greater biopotency than synthetic all-rac forms, widely accepted at about 1.36 to 1
- Plevnik Kapun et al. (2014) vitamin E lowered skin lesion scores versus placebo in 29 atopic dogs also on an antihistamine, over eight weeks
Vitamin C
3.75mgA water-soluble antioxidant that works alongside vitamin E.
Turmeric
15mgProvides curcumin, studied for supporting a healthy inflammatory response.
Clinical References
- Colitti et al. (2012) curcumin down-regulated inflammatory genes in white blood cells of dogs
- Kępińska-Pacelik & Biel (2023) review of turmeric and curcumin in dogs and humans
Cinnamon
15mgA warming spice providing polyphenols with antioxidant properties.
Clinical References
- Rao & Gan (2014) review of the antioxidant and anti-inflammatory compounds in cinnamon
Chamomile
11.25mgSoothing botanical that supports comfort and a healthy inflammatory response.
Clinical References
- Mehmood et al. (2015) antispasmodic activity of chamomile in experimental models
Milk Thistle
11.25mgProvides silymarin, which supports the liver, the organ that processes much of what the gut absorbs.
Clinical References
- Ural et al. (2021) silymarin and curcumin studied as nutritional support in atopic dogs
Green Tea
7.5mgA source of catechins, polyphenols with antioxidant properties.
Clinical References
- Serisier et al. (2008) green tea supplementation studied in dogs
Black Pepper Extract
1.5mgPiperine, which supports the absorption of other botanical compounds.
Clinical References
- Shoba et al. (1998) increased curcumin bioavailability in humans
View Full Composition
Complete ingredient declaration, in descending order of inclusion.
- Potato Flour 34.70%
- Inactivated Yeast 9.97%
- Glycerine 9.00%
- Fava Bean Flour 8.50%
- TruPet™ Postbiotic 5.00%
- Biolex® MB40 MOS 4.97%
- Blackstrap Molasses 4.00%
- Pea Flour 4.00%
- Chicory Root Powder (Fibrofos™ 60) 3.50%
- Evening Primrose Oil 1.50%
- Dried Algae (Schizochytrium sp., DHAgold™) 1.00%
- Calcium Carbonate 1.00%
- Pumpkin Seed Flour 1.00%
- Cranberry 1.00%
- Borage Oil 1.00%
- Sophora Japonica 0.63%
- Turmeric Powder 0.50%
- Cinnamon Powder 0.50%
- Maltodextrin 0.27%
- Lactobacillus helveticus HA-122 (heat-inactivated) 0.03%
View Full Nutritional Analysis
Typical analysis. Additive figures are declared per kilogram of food.
Analytical Constituents
- Crude Protein 4.41%
- Crude Fat 3.48%
- Crude Ash 7.69%
- Crude Fibre 1.70%
- Sodium 0.01%
Nutritional Additives
- Vitamin E, RRR-alpha-tocopherol (3a700ii) 2,010 mg/kg
- Vitamin D3, cholecalciferol (3a671) 33,750 IU/kg
- Vitamin C, ascorbic acid (3a300) 1,250 mg/kg
- Zinc chelate of glycine hydrate (3b607) 3,750 mg/kg
- L-Glutamine (3c451), amino acid 16,250 mg/kg
Technological Additives
- Binder: Clinoptilolite from sedimentary origin (1g568) 23,042.25 mg/kg
Sensory Additives
- Matricaria recutita (chamomile) (2b) 3,750 mg/kg
- Silybum marianum (milk thistle) (2b) 3,750 mg/kg
- Urtica dioica (stinging nettle) (2b) 3,750 mg/kg
- Camellia sinensis (green tea) (2b) 2,500 mg/kg
- Black pepper extract (2b) 500 mg/kg
- Vegetable flavouring (2b) 15,000 mg/kg
Zootechnical Additives
- Gut flora stabiliser: Bacillus velezensis DSM 15544 (Calsporin®) (4b1820) 250,000,000 CFU/g
Setting Expectations
Your Dog's Journey With Block
Supporting skin from the inside out is a gradual, biological process, not an instant fix. Here is what many owners report as a general guide.
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Week 1-2
Settling In
The probiotic strain begins to settle while the prebiotic fibres start feeding beneficial bacteria. Some dogs have a brief digestive adjustment as the microbiome shifts, which usually passes within a week.
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Week 2-4
Early Comfort
As the quercetin-rich botanicals and postbiotics establish, many owners notice a more settled, comfortable dog.
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Month 2-3
Skin and Coat
As the skin barrier is supported by GLA, DHA and zinc, many owners report softer skin and a glossier, healthier-looking coat.
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Ongoing
Year-Round Resilience
Consistent daily use maintains the gut, immune and skin-barrier support that Block provides, through changing seasons and everyday surroundings.
Many owners notice changes over the first few weeks. Giving Block consistently each day matters more than giving more.
Real Experiences
What Dog Owners Are Saying
Independent reviews collected by Feefo.
Better Together
Works Even Better Together
Block works best on a strong gut foundation. Pair it with Biotics and the gut-skin axis is supported at both ends: Biotics at the microbial root, Block at the skin.
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The Skin & Coat Routine
Biotics supports the gut where skin health begins, while Block works along the gut-skin axis. For a calmer coat, less scratching and a healthier shine.
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FAQ
Your Questions Answered
What are Bonza Supplements?
Supplements are daily soft-chew supplements for dogs. Every Bite is built on a gut-health foundation, the Biotics Triad of prebiotics, probiotics and postbiotics, then layered with targeted bioactives that work along a specific gut-organ axis to support a particular concern, from digestion and skin to calm, joints and senior vitality.
What is Block, and who is it for?
Block is the skin and coat chew in the Supplements range. It is formulated for dogs prone to itching and sensitive skin, including dogs whose skin reacts to the seasons, their food or their surroundings. It combines the Biotics Triad with quercetin-rich botanicals, GLA-rich oils and vitamin D3 to support a calm skin response, a strong skin barrier and a balanced immune response.
What is the Biotics Triad?
It is the three-part gut foundation behind every Bite. Prebiotics feed the good bacteria, probiotics add more of them, and postbiotics deliver the beneficial compounds they produce. Together they support microbial diversity and the gut barrier, the base every other system builds on.
What is the gut-skin axis, and why does it matter for skin?
The gut-skin axis is the two-way communication between the gut and the skin. Around 70% of the immune system resides in the gut, so when the gut microbiome or gut lining is out of balance, the immune system can become quicker to overreact and the skin can pay the price. Block supports the gut-skin axis with prebiotics, a probiotic, postbiotics, L-Glutamine and clinoptilolite, alongside its skin-focused actives. Read more about the gut-skin axis.
What is quercetin, and why does Block contain three sources of it?
Quercetin is a flavonoid found in many plants, studied for its role in stabilising mast cells, the immune cells that release histamine. Block draws it from three botanical sources, Sophora japonica, stinging nettle and cranberry, each of which brings its own mix of related plant compounds alongside the quercetin.
My dog has been diagnosed with atopic dermatitis or another skin condition. Can I give Block?
Block is a food supplement, not a veterinary medicine, and it is not a treatment for any skin condition. Many owners of dogs with a diagnosed condition give Block daily to support skin comfort alongside the care plan their vet has put in place. Talk to your vet before starting, particularly if your dog takes allergy medication, and never stop or change a prescribed treatment without their advice.
My dog has seasonal sensitivities. When should I start Block?
Many owners start Block two to four weeks before their dog's usual season, which gives the gut and immune-supporting actives time to establish. For year-round sensitivities, Block is designed for daily, ongoing use.
Which Bioactive Bite is right for my dog?
Choose by the concern that matters most: Belly for digestion, Biotics for microbiome balance, Block for skin and coat, Bliss for calm, Bounce for joints and mobility, Banish for flea-season skin and coat support, and Boost for the senior years. If skin and coat are your main concern, Block is the place to start. You can compare all seven Bites on our Supplements page.
What is the difference between Block and Banish?
Block supports skin and coat through the gut-skin axis, a balanced immune response and the skin barrier. Banish is formulated for flea-season skin and coat support. Some owners give both during the warmer months; introduce them gradually and follow the feeding guide on each pack by your dog's weight.
Are Supplements suitable for sensitive dogs, puppies and seniors?
Supplements are made without meat, wheat, soy, corn or artificial additives, which suits many dogs with sensitivities. They are formulated for dogs from 12 weeks and older. If your dog has a medical condition or takes medication, check with your vet before starting.
What is Block free from, and is it suitable for dogs with allergies?
Block is made without meat, wheat, soy or corn, so it contains no chicken or beef, the proteins most often behind food sensitivities in dogs. That makes it a gentle daily choice for many sensitive dogs. If your dog has a diagnosed allergy, check the full ingredient list above before starting, and have a word with your vet if you are unsure.
Why is Block plant-based?
Plant-based by consequence, not by trend. The most common food sensitivities in dogs are animal proteins like chicken and beef, so a plant-based formula sidesteps them, which is what makes Block gentle on sensitive dogs. It suits vegan households too, but the reason we make it this way is health, not ideology.
Is Block suitable for pregnant or nursing dogs?
For pregnant or nursing dogs, check with your vet before starting. Their nutritional needs change during this time, and your vet can advise on what is right for them.
Are Supplements safe?
Yes. Supplements are food supplements made from food-grade ingredients at gentle, effective levels, formulated by our nutritionist and approved by our veterinary advisory board. They are supplements, not medicines, and are designed to complement a balanced diet rather than replace veterinary care. They are made for daily, long-term use, with no need to cycle on and off. If your dog has a health condition or takes medication, check with your vet before starting.
Are there any side effects?
Block is well tolerated by most dogs. A small number have a minor digestive adjustment in the first few days as the microbiome adapts to the prebiotic and postbiotic compounds, which usually settles within a week. If your dog has a known sensitivity to any listed ingredient, check with your vet before starting.
Who formulated Block?
Block was formulated by Bonza's founder, Glendon Lloyd, who holds Diplomas in Canine Nutrition and Dog Nutrigenomics, both with Distinction, and it is approved by our Veterinary Advisory Board. Every ingredient is selected on published research and included at a meaningful level.
Are the ingredients backed by evidence?
Yes. Every active is chosen for a reason and included at a meaningful level, not a token pinch. Block is nutritionist formulated and vet approved, and you can see each ingredient, its inclusion level and the published research behind it in the full formula above.
What is cold extrusion, and why does it matter?
Cold extrusion is a low-temperature way of shaping the chews. Every Bite is formed at just 38°C, close to a dog's body temperature, rather than the high heat of conventional cooking and standard extrusion. That matters because heat degrades many of the actives we use, from prebiotic fibres and delicate oils to vitamins and plant compounds. Keeping the process gentle helps preserve them, so the levels shown in the formula are protected through manufacture.
How long until I see a difference?
Many owners notice a more settled, comfortable dog within two to three weeks. Skin barrier and coat changes build over six to twelve weeks of consistent daily use, and dogs with long-standing sensitivities may take longer. Giving Block consistently each day matters more than giving more.
Can I give Block with medication or other supplements?
Block is a food supplement rather than a medicine, and it generally sits comfortably alongside a balanced diet and other supplements. If your dog takes medication, including allergy medication, steroids or immunosuppressants, check with your vet first, as they can advise on timing and suitability.
How many Bites should I give my dog?
Give Block daily by your dog's weight: one Bite up to 10kg, two Bites for 10 to 20kg, three Bites for 20 to 30kg, and four Bites over 30kg. Give as a treat or with food, and keep to the same time each day. Consistency matters more than giving more.
Can my dog have too many?
Block is made from food-grade ingredients at gentle levels, so an extra Bite now and then is not a cause for alarm. Stick to the daily amount for your dog's weight for the best results. If your dog ever gets into a whole pack, a large one-off amount may cause temporary loose stools, so keep an eye on them and contact your vet if you have any concerns.
Can I give my dog more than one Bite at a time?
Yes. Many owners pair Block with Biotics as the Skin & Coat Routine, with Biotics supporting microbial balance at the root and Block targeting the skin. When combining more than one, introduce them gradually and follow the feeding guide on each pack by your dog's weight.
Can I give Bites alongside my dog's usual food?
Yes. Supplements are a daily soft chew given as a treat or with food, so they fit alongside whatever your dog already eats, including our Superfoods & Ancient Grains. If you are introducing more than one Bite, add them gradually.
What if my dog doesn't like the Supplements?
Most dogs take to the soft chews readily, but if yours does not, that is exactly what our Health & Happiness Guarantee is for. Get in touch and we will make it right.
What is the Health & Happiness Guarantee?
Your dog's health and happiness is our number one priority. If your dog doesn't take to their Bites, or you're not completely happy for any reason, you get your money back, no quibbles, with no need to return anything: simply donate any unwanted Bites to a friend or a nearby animal shelter. You can read the full terms on our Health & Happiness Guarantee page.
How does Subscribe & Save work?
Subscribe & Save takes 10% off every delivery and delivers on a schedule matched to your dog's weight. You can pause, change or skip a delivery, or cancel, at any time.
How should I store them?
Keep the pouch in a cool, dry place and reseal it after each use to keep the chews fresh.
Still have a question? Search our help articles or get in touch.
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