One messy backyard cleanup can be a fluke, but repeated loose stools often signal that something in your dog’s diet or digestive system needs attention. The right food can make a meaningful difference by supporting healthy digestion, promoting firmer stools, and providing nutrients without placing unnecessary stress on the gut. Ingredients such as highly digestible proteins, appropriate fiber, prebiotics, and limited or carefully selected fat sources can be especially important for dogs with sensitive stomachs. Choosing poorly suited food, on the other hand, may prolong digestive upset or make it harder to identify what is triggering the problem. Because persistent diarrhea can also point to parasites, infections, food intolerances, or other health concerns, consider diet alongside veterinary guidance if symptoms continue. In this guide, we’ll break down the best dog foods for loose stools, what ingredients to look for and avoid, and how to choose an option that supports healthier, more consistent digestion.
Can Changing Your Dog’s Food Help With Loose Stools?
Yes, changing your dog’s food can help with loose stools when the current diet is difficult to digest, too rich, poorly tolerated, or not well matched to your dog’s needs. Foods with highly digestible proteins, appropriate fiber, and carefully selected ingredients may improve stool consistency and overall digestive comfort. However, loose stools can also be caused by parasites, infections, stress, food sensitivities, or medical conditions, so diet changes are not always the full solution.
The Best Dog Foods for Loose Stools According to Science
According to the latest research, highly digestible diets, targeted fiber blends, and hydrolyzed protein formulas may help improve stool consistency in dogs with acute or chronic loose stools.
📄Research Update — Acute Diarrhea
A Fortified Highly Digestible Diet May Help Firm Stools Faster
A randomized, double-blinded trial in dogs with mild to moderate acute diarrhea found that a highly digestible prescription diet containing a probiotic, fructo-oligosaccharides, plasma protein, yeast, and sepiolite restored normal fecal consistency faster than a highly digestible control diet. The findings suggest that carefully formulated gastrointestinal diets can play an important role in managing uncomplicated loose stools.[1]
📊Clinical Focus — Dietary Fiber
The Right Fiber Blend Can Improve Chronic Loose Stools
In a prospective multicenter study of dogs with chronic large-bowel diarrhea, a complete therapeutic food containing selected plant fibers significantly improved stool consistency and other gastrointestinal signs. This supports choosing foods with purposeful fiber sources rather than assuming that simply adding more fiber will improve every case of loose stools.[2]
⚠️Clinical Focus — Chronic Enteropathy
Hydrolyzed Diets Can Be Valuable When Loose Stools Are Chronic
A multicenter study of dogs with chronic enteropathy found improved stool consistency after transition to hydrolyzed protein diets, including improvement in most dogs for whom the diet change was the only new intervention. For dogs with persistent or recurrent loose stools, a veterinarian-supervised hydrolyzed diet trial may therefore be more appropriate than repeatedly switching standard foods.[3]
Remember to ALWAYS consult with your vet before making any changes that could affect your dog’s health, nutrition, or well-being. If you can’t reach your vet, you can chat live with a registered online veterinary professional via our online vet chat or video chat support(24 hours a day, 7 days a week). Or use Chewy’s online vet services(6 a.m. – midnight ET). Additionally, at-home dog gut health tests can analyze your dog’s microbiome, offering insights into which nutrients their diet should include. Similarly, at-home dog allergy testing kits can identify ingredients that may not be suitable for your dog, enabling you to choose the right diet and care plan to support optimal digestion, nutrition, and health.
Best Dog Foods for Loose Stools
Here are the best dog foods for loose stools this year.
Best Overall Dog Food for Loose Stools
4.9
★★★★★
Ollie
Who It’s For: Dog owners seeking a well-rounded food that supports firmer stools, gentle digestion, and everyday nutrition without making mealtimes complicated or overly restrictive daily.
Why we recommended it:Ollie Fresh supports digestive health without sacrificing ingredient quality. Each recipe includes fiber-rich vegetables like pumpkin, peas, and sweet potatoes, which promote regular bowel movements and gut health. What makes it more effective than many over-the-counter fiber-boosting kibbles is the moisture content—fresh food naturally contains more hydration, which further aids digestion and stool consistency. Owners often report improved energy, shinier coats, and fewer GI issues after switching.
What sets it apart from competitors: Ollie tailors meals based on your dog’s profile—age, weight, breed, and health goals. This personalized approach ensures balanced fiber levels and appropriate calorie content. It’s also AAFCO-compliant and cooked at low temperatures to retain nutrients. What really separates Ollie is transparency: they provide a full ingredient and nutrient breakdown for each recipe and manufacture their food in USDA-regulated facilities.
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Who It’s For: Dog owners who prefer convenient kibble made with digestible ingredients and stool-supporting fiber to help dogs with loose stools maintain steadier digestion day to day.
Why we recommended it:Open Farm Digestive Health because it strikes a balance between convenience and digestive support. Each formula contains a thoughtful blend of natural prebiotics and fiber-rich ingredients like pumpkin, chicory root, and oatmeal to promote healthy stool formation and regularity. Unlike standard dry foods that rely heavily on fillers, this one uses recognizable whole-food ingredients and avoids artificial additives. Dogs often experience smoother digestion and firmer stools within a few weeks of transitioning.
What sets it apart from competitors: It’s made with ethically raised meat and non-GMO fruits and veggies, which resonates with environmentally conscious pet owners. Another notable difference is its inclusion of postbiotics, which support gut health at the cellular level—something even premium kibbles often lack.
Who It’s For: Small-breed dogs with loose stools that need easy-to-digest nutrition, appropriate portions, and balanced fiber to support firmer stools without overwhelming small stomachs.
Why we recommended it:Royal Canin Canine Care Nutrition Small Weight Care combines portion control with fiber-focused satiety. It’s formulated to help dogs feel full between meals, which can be a game-changer for small breeds that are constantly hungry. The mix of soluble and insoluble fibers helps support healthy digestion while regulating appetite, making it easier to maintain an ideal body weight.
What sets it apart from competitors: It stands out for its breed-size-specific approach. The kibble is sized and textured for smaller jaws, making it easier to chew and more enjoyable for toy and miniature breeds. It’s also one of the few high-fiber kibbles scientifically formulated with precise nutrient ratios, and it’s backed by veterinary nutritional research. This formula includes L-carnitine to help metabolize fat efficiently.
Best Dog Food for Loose Stools & Weight Loss
4.7
★★★★★
Blue Buffalo True Solutions
Who It’s For: Dogs with loose stools that also need weight control, with food that balances digestibility, satisfying fiber, and sensible calories to support firmer stools and a healthy weight.
Why we recommended it:Blue Buffalo True Solutions Weight Control offers a smart balance of high fiber and moderate calories without skimping on nutrition. The inclusion of real chicken as the first ingredient ensures adequate protein, while added fiber from ingredients like pea fiber and dried beet pulp helps dogs feel fuller longer—an essential factor in successful weight loss. This food also includes L-carnitine to support fat metabolism, and many owners report noticeable weight loss in their dogs within a couple of months, along with improved energy levels.
What sets it apart from competitors: Addresses weight management but also supports overall health with LifeSource Bits—a blend of antioxidants, vitamins, and minerals formulated to support immune health. Unlike some low-fat or high-fiber foods that can be unappealing, owners often note their dogs still enjoy the taste.
Best Prescription Dog Food for Loose Stools
4.5
★★★★★
Royal Canin Gastrointestinal
Who It’s For: Dogs with persistent or medically linked loose stools that need a veterinary diet formulated for digestive support, controlled ingredients, and more predictable stool quality.
Why we recommended it:Royal Canin Gastrointestinal High Fiber provides targeted digestive support while still meeting a dog’s full nutritional needs. With a carefully balanced blend of soluble and insoluble fibers, it helps regulate transit time and stool consistency, offering relief for both diarrhea and constipation. The inclusion of prebiotics supports a healthy gut microbiome, which can be crucial for long-term GI health. Many pet owners report that their dogs experience consistent, firm stools and reduced flare-ups of GI distress after switching to this diet under vet guidance.
What sets it apart from competitors: Offers high-fiber clinical precision. Unlike general high-fiber foods, it’s developed specifically to manage gastrointestinal disorders and is backed by extensive veterinary research. It’s also highly digestible and includes omega-3 fatty acids from fish oil, which help reduce gut inflammation. A notable feature is its low-fat content, making it appropriate for dogs who need both fiber and fat restriction.
Best Dog Food for Puppies with Loose Stools
4.7
★★★★★
The Honest Kitchen Puppy
Who It’s For: Puppies with loose stools that need highly digestible, growth-focused nutrition with balanced fiber and essential nutrients to support firmer stools and healthy development.
Why we recommended it:The Honest Kitchen’s Whole Food Clusters because it combines the structure of dry food with the benefits of whole, slow-roasted ingredients. The fiber content comes naturally from wholesome additions like oats, barley, pumpkin, and carrots—helping to regulate digestion while supporting nutrient absorption. Puppies fed this food often show steady growth, firm stools, and high energy levels. It’s made in small batches and gently baked rather than extruded, preserving the integrity of key nutrients and improving digestibility.
What sets it apart from competitors: This formula is human-grade certified. That means every ingredient is legally safe for human consumption, and the food is produced in a human food facility, not a pet feed mill. It’s also free from GMOs, artificial preservatives, and meat meals. The Honest Kitchen also emphasizes traceable sourcing and transparency, which appeals to pet owners who care as much about food ethics as they do about health.
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Best Wet Dog Food for Loose Stools
4.8
★★★★★
Blue Buffalo Digestive Care
Who It’s For: Dogs with loose stools that prefer soft, moisture-rich meals made with digestible ingredients and balanced fiber to support hydration, appetite, and more consistent stools.
Why we recommended it:Blue Buffalo True Solutions Digestive Care because it blends gut-friendly ingredients with gentle, high-moisture nutrition that’s easy on the stomach. It includes natural prebiotic fiber from ingredients like pumpkin and chicory root, which support healthy stool quality and promote the growth of beneficial gut bacteria. This formula is also crafted with real chicken as the first ingredient, providing lean, easily digestible protein. It offers a grain-free, carrageenan-free formulation that appeals to owners who avoid common fillers and thickening agents. A few owners have noted the consistency is more pâté-like than chunky, which some dogs love, but others may not.
What sets it apart from competitors: Unlike many wet foods that are simply softer versions of kibble, this one is part of Blue Buffalo’s vet-formulated True Solutions line, which targets specific health concerns. It’s made with clean, natural ingredients and fortified with vitamins, minerals, and Blue’s signature LifeSource Bits—though in a finely blended format suited for wet food.
Best Senior Dog Food for Loose Stools
4.5
★★★★★
Solid Gold
Who It’s For: Senior dogs with loose stools that benefit from gentle, digestible nutrition with balanced fiber and age-appropriate nutrients to support stool quality and daily digestive comfort.
Why we recommended it:Solid Gold’s Healthy Weight Management is one of the few senior-focused dry foods that prioritizes both fiber and gut health without compromising on quality protein. The use of wild-caught Alaskan pollock provides a lean, easily digestible protein source, while whole grains like brown rice and pearled barley contribute soluble and insoluble fiber. These help support regular digestion and promote a feeling of fullness—critical for seniors who need to reduce calories but still feel satisfied.
What sets it apart from competitors: Solid Gold sets itself apart with its emphasis on gut health. Each serving contains a blend of 20 nutrient-rich superfoods and probiotics designed to support digestion and immune function. It’s one of the few dry foods in its category that includes live probiotics at guaranteed levels. Additionally, the formulation is free from corn, soy, and artificial preservatives, which appeals to health-conscious pet owners.
BestDog Food for Large Breeds with Loose Stools
4.6
★★★★★
ACANA Wholesome Grains
Who It’s For: Large-breed dogs with loose stools that need digestible nutrition, balanced fiber, and appropriate calories to support firmer stools while meeting the needs of bigger bodies.
Why we recommended it:ACANA Wholesome Grains for large breeds blends high-quality animal protein with functional grains like oats, sorghum, and pumpkin to support stable digestion and sustained energy. The moderate fiber content helps promote regular bowel movements, while the inclusion of glucosamine and chondroitin supports joint and hip health—crucial for bigger dogs as they age.
What sets it apart from competitors: ACANA sets itself apart by focusing on a biologically appropriate philosophy—packing its recipes with 60–70% premium animal ingredients, including free-run chicken and turkey. The remaining portion consists of carefully selected wholesome grains and fiber sources that add digestive value without fillers like corn or wheat. Another standout is traceability—each ingredient is sourced with regional integrity, and the brand is transparent about sourcing and manufacturing.
Best Grain-Free Dog Food for Loose Stools
4.7
★★★★★
Wellness CORE Grain-Free
Who It’s For: Dogs with loose stools whose owners prefer a grain-free formula, with digestible ingredients and balanced fiber chosen to support firmer stools without relying on common grains.
Why we recommended it:Wellness CORE Healthy Weight is one of the few grain-free options that successfully balances high fiber with weight management goals. With real turkey and chicken leading the ingredient list, it provides lean animal protein to maintain muscle mass while reducing fat content to help shed excess weight. The addition of fiber from peas, flaxseed, and carrots helps dogs feel full longer, which can reduce overeating.
What sets it apart from competitors: This grain-free formula does not rely on excessive starchy fillers like potatoes or tapioca, which are common in other grain-free foods. Instead, it focuses on protein-rich nutrition with moderate carbohydrates and meaningful fiber levels. It’s also fortified with glucosamine and chondroitin for joint support and contains guaranteed levels of probiotics for gut health.
Best High Fiber Dog Food for Kidney Disease & Loose Stools
4.6
★★★★★
Raised Right Kidney Support
Who It’s For: Dogs with kidney disease and loose stools that need veterinarian-guided nutrition with appropriate fiber to support stool quality while respecting kidney-specific dietary needs.
Why we recommended it:Raised Right Kidney Support takes a fresh, human-grade approach to kidney care. The food is crafted with whole, limited ingredients like turkey, quinoa, carrots, and blueberries, providing natural sources of fiber without artificial thickeners or fillers. It’s formulated with veterinary nutritionists to include lower phosphorus and sodium levels, helping reduce the burden on compromised kidneys. Fiber from carrots and blueberries supports digestive health, which is often disrupted in dogs with CKD.
What sets it apart from competitors: Each batch is lightly cooked and lab-tested for safety, and the company publishes actual lab results for every recipe. Unlike many kidney support formulas that use meat meals or by-products, Raised Right uses whole cuts of meat and no synthetic preservatives. It’s also one of the few kidney diets that’s both home-style cooked and high in natural fiber—without sacrificing palatability.
Best High-Protein Dog Food for Loose Stools
4.7
★★★★★
Blue Buffalo Wilderness
Who It’s For: Dogs with loose stools that do well on protein-rich diets, with highly digestible protein and balanced fiber to support lean muscle while encouraging firmer, more regular stools.
Why we recommended it:Blue Buffalo Wilderness Healthy Weight strikes a rare balance between muscle-building protein and appetite-managing fiber. Real deboned chicken is the first ingredient, supplying essential amino acids to maintain muscle mass during weight loss. At the same time, fiber-rich ingredients like peas, sweet potatoes, and cellulose help dogs feel full without adding extra calories.
What sets it apart from competitors: This food stands out for its high protein content, making it an ideal choice for weight management. Many “diet” kibbles cut protein too drastically, which can lead to muscle loss. This recipe keeps protein high without pushing fat too far, and it’s also grain-free for dogs with sensitivities. Blue’s exclusive LifeSource Bits—cold-formed to preserve potency—deliver a mix of antioxidants and nutrients that support immune health and overall wellness.
Best Dog Food for Allergies & Loose Stools
4.8
★★★★★
Diamond Naturals Light Lamb
Who It’s For: Dogs with food sensitivities or allergies and loose stools that need a carefully selected formula with limited triggers, digestible ingredients, and fiber for steadier digestion.
Why we recommended it:Diamond Naturals Light Lamb & Rice avoids many common allergens while still providing balanced nutrition and beneficial fiber levels. Lamb meal serves as a novel, single animal protein source, reducing the risk of triggering food sensitivities. Brown rice, peas, and beet pulp contribute natural fiber that promotes digestive health and regular bowel movements.
What sets it apart from competitors: Diamond Naturals stands out by combining allergy-friendly ingredients with added gut and immune support. It’s enriched with probiotics, antioxidants, and omega fatty acids to promote skin health and improve digestive function—two of the most common concerns in dogs with allergies. It also offers excellent value for a limited-ingredient, high-fiber food without relying on grain-free marketing.
How to Transition Your Dog to a New Diet for Loose Stools
Changing foods too quickly can upset digestion and make loose stools harder to evaluate. Unless your veterinarian recommends a faster change, transition gradually over about seven days by increasing the new food while decreasing the old food. The table below provides a simple schedule you can adjust for dogs that need a slower transition.
Transition Period
Old Food
New Food
What to Do
Days 1–2
75%
25%
Mix a small amount of the new food into each meal.
Days 3–4
50%
50%
Increase the new food if your dog is tolerating the change.
Days 5–6
25%
75%
Continue replacing the old food with the new diet.
Day 7+
0%
100%
Feed the new diet fully once the transition is well tolerated.
Sensitive Dogs
Reduce slowly
Increase slowly
Extend each stage for a few extra days if your vet recommends it.
Monitoring Your Dog’s Progress on a New Diet for Loose Stools
After the switch, pay attention to stool consistency and frequency, appetite, vomiting, and your dog’s usual energy level. Improvement should generally look like better-formed stools, fewer urgent bowel movements, normal eating habits, and comfortable digestion.
Also watch for unintended weight loss or gain and whether digestive symptoms are becoming more frequent or severe. Contact your veterinarian if loose stools persist or worsen, vomiting develops, appetite drops, your dog becomes unusually lethargic, or you notice blood in the stool.
Dogs with chronic digestive problems or other medical conditions should be monitored with veterinary guidance. Your veterinarian can help determine whether the diet is working or whether further testing or a different nutrition plan is needed.
The Bottom Line
Choosing the best dog food for loose stools starts with finding a formula that is easy to digest and suited to your dog’s individual needs. Highly digestible proteins, appropriate fiber, and carefully selected ingredients can help support firmer stools and more comfortable digestion. Some dogs may benefit from specialized options such as hydrolyzed, prescription, high-fiber, or sensitive-stomach diets depending on the cause of their digestive issues. Age, breed size, allergies, weight goals, and existing health conditions should also guide your choice. When changing foods, a gradual transition can help minimize additional digestive upset. Once your dog is eating the new diet, monitor stool quality, appetite, energy, weight, and other digestive symptoms. Persistent or worsening loose stools should be discussed with your veterinarian so the underlying cause and appropriate diet can be addressed.
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Sources
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