Best Dog Food for Shih Tzu Adults – 2026 Reviews

Shih tzus bring a whole lot of personality in a compact, lovable package. But their unique build – short muzzle, flowing coat, and often sensitive digestion – means picking the right kibble isn’t just about what’s on sale. The wrong formula can lead to picky eating, tear stains, or tummy troubles that nobody wants to deal with. We surveyed the field to find foods that actually work for adult shih tzus, not just any small dog.

What separates a great shih tzu food from a so‑so one comes down to a few practical things: kibble size and shape that a flat face can actually grab, targeted nutrients for that signature coat, and ingredients gentle enough for a breed prone to digestive sensitivity. We didn’t just compare labels – we dug into what owners consistently report and where the formulas genuinely differ. The result is a shortlist that puts your shih tzu’s real‑world needs first, no brand loyalties attached.

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Best Dog Food for Shih Tzu Adults – 2026 Reviews

Best Overall
Bag of Royal Canin Shih Tzu Adult dry dog food
ROYAL CANIN

Shih Tzu Adult – Breed-Specific Kibble & Coat Nutrition

A purpose‑built formula for purebred shih tzus, with a kibble shape designed for short muzzles and an underbite. It packs omega‑3s, biotin, and highly digestible proteins to address the breed’s signature coat and stool‑quality challenges.

Breed‑specific kibble shapeOmega‑3 & biotin for coatDigestive protein blend
10.0
Exceptional
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What I Loved

This is the only formula in the lineup built exclusively for shih tzus, and it shows. The specialized kibble – flat, easy to pick up, and sized for an underbite – matters more than you’d think; owners report cleaner feeding and less mess. The coat results are equally striking: a cocktail of EPA, DHA, vitamin A, and biotin yields a noticeably softer, shinier coat in weeks. Digestion gets a boost from highly digestible proteins and a precise fibre mix, leading to firmer, less odorous stools – a frequent pain point for the breed. The bag lasts well, and shih tzus seem to genuinely enjoy the taste, even the picky ones. If you want a set‑it‑and‑forget‑it option that covers the breed’s quirks without supplements, this is it.

Not So Good

It sits in a higher price tier, so budget‑conscious owners may pause. The size of the bag can be limiting for multi‑dog households. A few dogs needed a gradual transition to avoid mild tummy upset.

Bottom Line

The single best all‑around dry food for an adult shih tzu, purpose‑built to tackle the breed’s unique muzzle, coat, and digestive needs in one bag.

Best Budget
Bag of IAMS Proactive Health Minichunks dry dog food
IAMS

Proactive Health Minichunks – Affordable All‑Breed Nutrition

A wallet‑friendly option that doesn’t skimp on quality. The smaller minichunks kibble works for many shih tzus, and the chicken‑and‑whole‑grain recipe supports digestion and dental health without artificial additives.

Small minichunks kibbleDigestive fibre & prebioticsDental scrub texture
9.5
Exceptional
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What I Loved

For the price, this food delivers remarkably consistent quality. The minichunks kibble is small enough for most shih tzus to handle comfortably, and the crunchy texture helps scrub teeth with every bite – a bonus for a breed prone to dental issues. The fibre and prebiotic blend supports healthy digestion, and the 10‑day stool‑improvement claim holds up in owner feedback, with many reporting firmer waste quickly. It’s a complete, balanced formula with no fillers or artificial preservatives, and the chicken flavour wins over even the pickiest eaters. The large bag offers excellent value per kilo, making it a smart choice for households watching their budget without cutting nutritional corners.

Not So Good

It’s not breed‑specific, so the kibble isn’t optimized for a shih tzu’s flat face. A few dogs with very sensitive stomachs didn’t tolerate it as well. The formula is grain‑inclusive, which may not suit every owner’s preference.

Bottom Line

The best value pick that still covers the basics well – ideal for healthy adult shih tzus when budget is the top priority.

Bag of Royal Canin Small Breed Adult dry dog food
ROYAL CANIN

Small Breed Adult – Precise Nutrition for Little Dogs

Tailored for small dogs 9-22 lbs, this formula uses highly digestible proteins and prebiotics to support a sensitive microbiome. The kibble is engineered for tiny mouths, though not specifically for the shih tzu jaw.

Small‑dog kibble designCalcium & phosphorus for bonesPrebiotic fibre blend
9.3
Excellent
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What I Loved

This is an excellent everyday option for shih tzus that don’t need the full‑on breed‑specific formula. The kibble is suitably small and easy to chew, and the digestible proteins plus prebiotics gently support gut health. The calcium‑phosphorus balance is a thoughtful touch for maintaining strong bones in a breed that can be accident‑prone. It also keeps energy levels appropriate for a small, moderately active dog, so weight management stays on track. The resealable bag is a small but appreciated convenience. Owners note their dogs like the taste, and coat condition tends to improve over time.

Not So Good

The bag size is smaller than average, so cost per kilo is higher than some competing small‑breed foods. Not as laser‑focused on shih tzu coat needs as the breed‑specific version. Transitioning to it quickly can cause loose stools.

Bottom Line

A reliable small‑breed formula that covers all the essentials, though shih tzu‑specific concerns like muzzle fit and coat are better served by the breed‑dedicated option.

Bag of Hill's Science Diet Adult Small & Mini dry dog food
Hill's Science Diet

Adult Small & Mini – Digestive & Immune Support

A vet‑respected pick that leans on easily digestible ingredients and pumpkin for gentle digestion. The small kibble suits toy‑sized mouths, and the ActivBiome+ blend adds immune and organ health benefits.

Pumpkin for digestionActivBiome+ immune blendSmall kibble for mini breeds
9.2
Excellent
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What I Loved

The inclusion of pumpkin is a standout – it’s a natural, gentle fibre source that soothes sensitive stomachs, something many shih tzu owners struggle with. The new ActivBiome+ multi‑benefit blend extends support beyond digestion to immune and organ health, which feels comprehensive. The kibble size is genuinely small and easy for flat‑faced dogs to pick up. Backed by Hill’s nutritional science, this formula also promotes lean muscle maintenance with high‑quality protein, helping shih tzus stay trim. The flavour is well‑received, even among dogs that typically turn up their noses at kibble. The 2 kg bag is manageable and keeps fresh.

Not So Good

The price per kilo is higher than some alternatives, and the bag size is relatively small, so large households or multi‑dog families may find it less economical. A tiny fraction of dogs experienced initial gas during the switch.

Bottom Line

A scientifically sound choice that shines for shih tzus with finicky digestion, offering pumpkin‑powered gentleness and broad immune support.

Best Grain-Free
Bag of Nature's Recipe Grain Free Lamb dry dog food
Nature's Recipe

Grain Free Lamb – Limited Ingredient Diet

A limited‑ingredient, grain‑free formula centred on lamb, sweet potato, and pumpkin. It’s a solid choice for shih tzus with suspected grain sensitivities or allergies, with added joint and heart support.

Grain‑free & limited ingredientsGlucosamine for jointsTaurine for heart health
9.2
Excellent
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What I Loved

If your shih tzu scratches, licks, or battles ear issues, a grain‑free, limited‑ingredient formula can be a game‑changer. This one keeps things simple with lamb as the single animal protein and easy‑to‑digest carb sources like sweet potato and pumpkin. The addition of glucosamine and chondroitin from chicken meal supports those little joints, and taurine is a reassuring heart‑health inclusion. The kibble is a manageable size, and the omega‑3 and ‑6 fatty acids help maintain a glossy coat. Owners of allergy‑prone dogs consistently report fewer skin flare‑ups and brighter eyes. The 5.4 kg bag offers good value for a specialty diet.

Not So Good

The lamb flavour is strong, and a minority of dogs simply don’t like it. Kibble size isn’t optimized for flat faces, so some shih tzus may struggle initially. It’s not the cheapest grain‑free option on the shelf.

Bottom Line

The go‑to grain‑free option for shih tzus with sensitivities, delivering targeted skin, joint, and heart support without unnecessary fillers.

Bag of IAMS Proactive Health Small Breed dry dog food
IAMS

Small Breed – Chicken & Whole Grain, Small Kibble

Purpose‑made for dogs under 20 lbs, this recipe shrinks the kibble and adds antioxidants for immune health. It’s a straightforward, no‑fuss daily feeder that doesn’t break the bank.

Small‑breed kibble sizeAntioxidant immune supportZero artificial preservatives
9.1
Excellent
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What I Loved

The smaller, specially designed kibble makes a real difference for toy breeds; shih tzus eat more comfortably and with less mess. The chicken flavour is a crowd‑pleaser, and the formula includes antioxidants to bolster everyday immune function. Like its Minichunks cousin, it promotes firm stools within 10 days thanks to a targeted fibre and prebiotic mix. It’s an affordable, honest formula with no artificial colours or flavours, and the 7 lb bag is manageable for single‑dog homes. Coat condition and energy levels stay steady, according to owner reports.

Not So Good

The bag size is on the smaller end, so cost per kilo is higher than the Minichunks variant. Some very flat‑faced shih tzus still find the kibble a touch too thick. A handful of dogs experienced initial loose stools when switching too quickly.

Bottom Line

A dependable small‑breed formula that nails the kibble size and delivers solid nutrition at a fair price, though the Minichunks version offers better value per kilo.

Bag of Blue Buffalo Life Protection Fish & Brown Rice dry dog food
Blue Buffalo

Life Protection Fish – Omega‑Rich Skin & Coat Care

Whitefish is the first ingredient in this omega‑heavy recipe, complemented by LifeSource Bits for immune support. It skips poultry by‑products, corn, wheat, and soy for a cleaner bowl.

Deboned whitefish #1LifeSource Bits antioxidantNo poultry by‑products
8.9
Very Good
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What I Loved

The fish‑first recipe is a standout for shih tzus with chicken sensitivities or just a need for extra omega‑3s for coat lustre. The LifeSource Bits – cold‑formed kibble pieces with concentrated antioxidants – add a layer of targeted immune support you don’t see in most bags. The formula is reassuringly free of corn, wheat, soy, and poultry by‑products, which appeals to owners who scrutinize ingredient lists. Dogs tend to enjoy the taste, and the 11.7 kg bag is a good bulk buy for the price. The brand’s satisfaction guarantee provides peace of mind.

Not So Good

The kibble size is larger than many competitors here, which can be a struggle for flat‑faced shih tzus – some owners crush the kibble or add water. The fish smell is noticeable. A few dogs developed loose stools early on.

Bottom Line

A quality fish‑based option that excels at coat health, but the bigger kibble makes it a less natural fit for the typical shih tzu mouth.

Best for Weight Management
Bag of Hill's Science Diet Perfect Weight Small Bites dry dog food
Hill's Science Diet

Perfect Weight Small Bites – Clinically Proven Weight Loss

Clinically proven to help dogs shed pounds in 10 weeks, this low‑calorie, small‑bite formula is ideal for shih tzus carrying extra weight. It supports muscle maintenance while trimming down.

Proven weight loss in 10 wksLow‑calorie small bitesMuscle‑maintenance protein
8.8
Very Good
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What I Loved

Over 70% of dogs lost weight in controlled studies, which is compelling if your shih tzu’s waistline has disappeared. The small‑bite kibble is appropriately sized, and the formula manages to be low in calories without sacrificing satiety – owners report their dogs feel full and aren’t constantly begging. Added coconut oil and L‑carnitine support metabolism, while the protein level preserves lean muscle even as pounds drop. The 11.34 kg bag is a smart buy for weight‑loss journeys that take a few months. Dogs seem to enjoy the chicken flavour, and stools remain consistent.

Not So Good

This is the most expensive food in the lineup per kilo, so the weight‑loss phase can be a significant investment. It’s not suitable for shih tzus at an ideal weight – the calorie density is too low. A few dogs needed a slower transition to avoid digestive fuss.

Bottom Line

The clear winner for shih tzus that need to slim down, backed by clinical proof and a kibble size that works – just reserve it for weight‑loss periods.

Bag of Beyond Superfood Blend Salmon dry dog food
Beyond

Superfood Blend Salmon – Natural Ingredients, No Fillers

Wild‑caught salmon leads this natural recipe, with pumpkin and oatmeal for gentle digestion. Free from corn, wheat, soy, and poultry by‑products, it’s a clean‑label option for the ingredient‑conscious owner.

Wild‑caught salmon #1No corn, wheat, or soyPumpkin & oatmeal fibre
8.6
Very Good
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What I Loved

The ingredient list reads like a grocery list: wild‑caught salmon, pumpkin, oatmeal. That simplicity is the main draw. It’s free of artificial colours, flavours, and preservatives, and the absence of common allergens like corn, wheat, and soy makes it a decent starting point for elimination diets. The fibre from pumpkin and oatmeal keeps digestion moving, and the omega‑rich salmon supports skin and coat. The 10.2 kg bag offers good value for a natural‑focused food. Dogs tend to find the flavour appealing, and picky eaters often come around.

Not So Good

The kibble is designed for medium breeds, so the pieces can be too large and challenging for a shih tzu’s small mouth. Some owners report needing to break or soak the kibble. A few dogs had allergic reactions despite the clean label – likely to the salmon itself.

Bottom Line

A clean, natural recipe that will appeal to label‑readers, but the kibble size is a significant hurdle for the shih tzu’s flat face and small jaw.

Bag of Dog Chow Complete Chicken dry dog food
Dog Chow

Complete Chicken – Simple Everyday Nutrition

A no‑frills, budget‑level complete diet made with real chicken. It covers basic nutritional needs for adult dogs with no artificial flavours, but lacks small‑breed or shih tzu‑specific tailoring.

Real chicken ingredientAntioxidant immune supportNo artificial flavours
8.5
Very Good
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What I Loved

Sometimes simplicity is enough. This food provides 100% complete and balanced nutrition for an adult dog at the most accessible price point in the roundup. It uses real chicken, adds antioxidants for immune health, and skips artificial flavours. The 14 kg bag is massive, ideal for multi‑dog homes or those who want to buy once and forget for months. Dogs seem to eat it willingly, and stool consistency is generally fine. For a healthy adult shih tzu without digestive or coat concerns, it does the job of keeping the dog fed and nourished.

Not So Good

The kibble is standard‑sized pellets, not designed for small mouths – some shih tzus leave pieces behind or struggle to crunch them. It contains grains and by‑product meal, which ingredient‑conscious owners may avoid. No targeted breed or size benefits like dental texture or coat boosters.

Bottom Line

The most affordable way to feed an adult shih tzu the basics, but you give up specialized kibble design and coat‑focused nutrition.

How We Evaluated These Dog Foods for Shih Tzu Adults

We didn’t conduct controlled feeding trials with a panel of shih tzus. What we did: cross‑referenced 10 dry dog food models from 7 distinct brands across 12 decision axes – ingredient quality, protein source, kibble size and shape, breed‑specificity, digestive support (fibre, prebiotics, probiotics), coat‑health nutrients (omega‑3, biotin), calorie density, dental benefits, inclusion of fillers or artificial additives, stool‑quality claims, owner‑reported palatability, and bag‑size value. We triangulated published specifications, aggregated owner feedback where available, and mapped each formula against the nutritional needs of small‑breed adult dogs, with a focus on the shih tzu’s flat muzzle, flowing coat, and sensitive stomach.

The scoring framework weighted real‑world fit for shih tzu adults (60%) – how well each food addresses the breed’s physical and digestive quirks – against feature differentiation (40%) – unique advantages like a breed‑specific kibble or a clinically proven weight‑loss track record. We have no commercial relationship with any of the brands featured; recommendations track what works for the dog, not the logo on the bag. If your shih tzu is a typical healthy adult, the Royal Canin Shih Tzu Adult is your best match; if budget is the bigger concern, the IAMS Proactive Health Minichunks gets you most of the way there without stretching your wallet.

How to Choose the Right Dog Food for a Shih Tzu Adult

01

Why Breed‑Specific Formulas Matter for Shih Tzus

Not all small‑breed foods are created equal, and shih tzus sit at a unique intersection of needs. Their short, broad muzzle and underbite mean a standard round kibble can slip out of their mouth or require extra effort to crunch. A breed‑specific formula like Royal Canin’s Shih Tzu Adult goes further: the kibble is flattened and shaped to be easily grabbed by the front teeth, reducing mealtime frustration and mess. Beyond physics, shih tzus have a genetic tendency toward dry, brittle coats and stool odour issues – traits that a generic small‑breed mix may not address with the same precision. If your shih tzu is otherwise healthy, a breed‑dedicated diet often produces visible improvements in coat texture and litter‑box smell within a month.

02

Kibble Size and Shape: Small Bites for Small Mouths

The physical dimensions of the kibble are arguably the most overlooked factor for flat‑faced breeds. A pellet that’s too large or thick forces the dog to work harder, sometimes skipping meals entirely. Across our lineup, kibble size varied dramatically: the IAMS Small Breed and Hill’s Perfect Weight Small Bites both shrink the pieces enough for most shih tzus, while the Beyond Superfood Blend and Dog Chow Complete have larger, more generic pellets that can be a challenge. If your shih tzu tends to spit out kibble or leave pieces behind, prioritize a small‑bite or breed‑specific design. Even soaking the food in warm water can help with larger kibble until you switch.

03

Coat and Skin Nutrition: The Omega‑3 and Biotin Advantage

A shih tzu’s long, silky coat is one of its defining features – and a high‑maintenance one. Foods rich in omega‑3 fatty acids (DHA, EPA), omega‑6, and biotin directly support skin barrier function and hair strength. Royal Canin Shih Tzu Adult leans heavily into this with an exclusive nutrient complex, while Blue Buffalo Life Protection Fish derives omega‑3s naturally from deboned whitefish. Hill’s Science Diet Small & Mini includes pumpkin, which indirectly benefits the coat by improving digestion and nutrient absorption. When comparing labels, look for named fat sources like fish oil, flaxseed, or chicken fat – vague ‘animal fat” is a red flag. Many owners report a shinier, less tangled coat within six to eight weeks on a targeted formula.

04

Digestive Health: Fibre, Prebiotics, and Pumpkin

Shih tzus are notorious for sensitive stomachs, often reacting to sudden ingredient changes with loose stools or gas. A food that supports steady digestion can save you a lot of cleanup. Pumpkin is a hero ingredient here – gently bulking and soothing – and it’s featured prominently in Hill’s Science Diet Small & Mini and Nature’s Recipe Grain Free Lamb. Prebiotics (like chicory root) and highly digestible proteins (chicken meal, egg) further encourage a balanced gut microbiome. IAMS Proactive Health makes a bold 10‑day stool‑improvement claim that many owners confirm, thanks to its tailored fibre blend. If your shih tzu frequently deals with diarrhoea or constipation, transition slowly to any new food and consider a formula with multiple digestive aids.

05

Grain‑Free vs. Whole Grains: Which Is Right for Your Shih Tzu?

The grain‑free debate can be confusing. For the majority of shih tzus, whole grains like brown rice and oatmeal are safe, digestible, and provide valuable energy and fibre. Foods like IAMS Minichunks and Dog Chow Complete use grains effectively. However, a subset of shih tzus have true grain allergies or intolerances, manifesting as itchy skin, ear infections, or chronic digestive upset. For those dogs, a limited‑ingredient, grain‑free diet like Nature’s Recipe Lamb or Beyond Superfood Blend Salmon may resolve symptoms. Note that grain‑free does not automatically mean low‑carb; sweet potatoes and peas still provide starch. Always work with your vet to rule out other causes before assuming a grain allergy, and choose a grain‑free food with taurine supplementation to support heart health.

06

Balancing Quality and Budget: Finding the Right Food for Your Wallet

You don’t need to spend a fortune to feed a shih tzu well. The price spread among our picks is wide, but a higher price doesn’t always equal better results. IAMS Proactive Health Minichunks delivers reliable nutrition at an entry‑level cost, while the Royal Canin breed‑specific formula commands a premium for its tailored design. Consider the cost per day, not just the bag price – a 10 lb bag of a premium food might last a shih tzu six weeks, making the daily cost reasonable. If budget is tight, the Minichunks or Dog Chow Complete cover the basics; if you can stretch, the upgrade to a small‑breed specific or breed‑dedicated formula often pays off in reduced vet visits for skin or digestive issues. Buying larger bags almost always improves per‑kilo value, provided storage is dry and cool.

Frequently Asked Questions

What's the difference between Royal Canin Shih Tzu Adult and Royal Canin Small Breed Adult?

Both are made by the same brand, but they target different levels of specificity. The Shih Tzu Adult formula is exclusively designed for purebred shih tzus with a kibble shape optimized for the breed’s short muzzle and underbite, plus a nutrient complex heavy on omega‑3s, biotin, and vitamin A for coat health. The Small Breed Adult is a one‑size‑fits‑many small‑dog food (for dogs 9‑22 lbs) with a smaller kibble but no breed‑specific shaping or coat‑focused nutrient boost. For a healthy shih tzu, the breed‑dedicated food almost always delivers better coat and digestion results, though it costs more. If your shih tzu doesn’t have notable coat or eating‑difficulty issues, the Small Breed Adult is a capable, slightly more affordable alternative.

IAMS Minichunks vs. IAMS Small Breed: which is better for a shih tzu?

At first glance, the IAMS Small Breed seems like the obvious pick – it’s marketed for dogs under 20 lbs. However, both formulas use similar core ingredients and the Minichunks kibble is still quite small, having been tested on small dogs successfully. The Small Breed version offers a slightly smaller kibble and added antioxidants for immune support, but the Minichunks bag typically gives you more food per dollar. Many shih tzu owners report their dogs handle the Minichunks well; the key is checking that your individual dog can crunch the kibble comfortably. If your shih tzu is a particularly dainty eater or has a noticeably flat face, the Small Breed kibble may be the safer bet. For most shih tzus, the Minichunks provide better value without sacrificing quality.

My shih tzu has a sensitive stomach. Which food should I choose?

Start with a formula that prioritizes easy‑to‑digest ingredients and includes soothing fibres like pumpkin. In our lineup, Hill’s Science Diet Adult Small & Mini is purpose‑built for digestive sensitivity, combining pumpkin with a prebiotic blend and highly digestible chicken meal. Nature’s Recipe Grain Free Lamb is another strong candidate if grains are part of the issue, using limited ingredients and pumpkin as well. Transition any new food over 7‑10 days by mixing increasing amounts of the new kibble with the old. For ongoing sensitivity, consider a veterinary diet formulated for gastrointestinal health – something to discuss with your vet if these retail options don’t stabilize things. And always rule out environmental allergies or parasites before blaming the food alone.

Do shih tzus need grain‑free dog food?

Most shih tzus do not need a grain‑free diet. Whole grains like rice, barley, and oatmeal are well‑tolerated and provide stable energy. The push for grain‑free often stems from marketing, not science, for the average dog. However, a small percentage of shih tzus have a genuine grain intolerance that manifests as chronic itching, ear infections, or loose stools. If your vet suspects a grain allergy, a trial with a limited‑ingredient grain‑free food like Nature’s Recipe Grain Free Lamb can be diagnostic – if symptoms clear, grain sensitivity is likely. Without those symptoms, there’s no proven benefit to avoiding grains, and some grain‑free recipes have been linked to dilated cardiomyopathy (DCM) in dogs, though the connection is not fully understood. The safest approach: let your dog’s health, not trends, guide the decision.

Final Verdict

For the vast majority of adult shih tzus, the Royal Canin Shih Tzu Adult is the complete package – a kibble that’s actually shaped for their mouth, a nutrient profile that targets their coat, and digestion that stays consistent. It’s the pick that just works. If the price feels steep, the IAMS Proactive Health Minichunks is a smart budget swap that still handles kibble size and stool quality well. And when weight creeps up, the Hill’s Perfect Weight Small Bites is the clinically backed tool for getting your shih tzu back to a healthy shape. Wherever you land, prioritize a kibble your dog can actually eat – the best nutrition in the bowl means nothing if it never reaches the stomach.

Best Overall
Shih Tzu Adult – Breed-Specific Kibble & Coat Nutrition
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