The 12 Best Dog Foods for Constipation 2025: Vet-Approved

This content was reviewed and fact-checked by veterinarian Dr. Sandra Tashkovska, DVM.

Constipation is one of the most common digestive issues dogs face, and it can leave both pets and owners feeling uncomfortable and concerned. While occasional difficulty passing stool may resolve on its own, frequent or prolonged constipation often points to a dietary imbalance—most notably, a lack of fiber, hydration, or easily digestible ingredients. Choosing the right food plays a major role in keeping your dog’s digestive system regular and healthy. In this guide, we’ve reviewed the best dog foods for constipation, focusing on recipes that provide optimal fiber content, natural prebiotics, and balanced nutrition to promote smooth digestion and overall well-being.

The Best Dog Food for Constipation According to Science

According to the latest research, the best dog food to relieve constipation is a diet rich in specific types of dietary fiber, particularly blends containing fermentable fibers and plant polyphenols. 

These are the most effective mechanisms and ingredients that bring relief to constipation:

Table research study sources: ^{[1],[2],[3],[4],[5],[6]}

Therapeutic dog foods with targeted fiber blends improve stool quality, promote regularity, and support gut health.

Always consult your veterinarian before switching to a dog food for constipation. You can also get personalized dietary advice from a registered online veterinary nutritionist through platforms like Vetster. You can also chat with an online vet if your dog is experiencing digestive issues, irregular stools, or weight management challenges, who can help determine if a high fiber formula is the right choice. Additionally, at-home dog gut health tests can provide insights into your dog’s microbiome, revealing whether added fiber could support constipation relief. At-home food allergy tests may also identify ingredients to avoid, helping you choose a food that’s both safe and beneficial for your dog’s specific sensitivities.

Best Dog Food for Constipation

Here are the best foods for constipated dogs this year.

Best Overall Dog Food for Constipation

Flavor: 5

Protein: 32%

Fat: 25%

Fiber: 7%

Diet: AAFCO

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 constipation relief 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.

Best Dry Dog Food for Constipation

Flavor: Pollock

Protein: 29%

Fat: 11%

Fiber: 8.7%

Diet: AAFCO

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.

Best Dog Food for Small Breeds

Flavor: Chicken

Protein: 28%

Fat: 9%

Fiber: 10%

Diet: AAFCO

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 and relieve constipation.

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 Prescription Dog Food for Constipation

Flavor: Chicken & rice

Protein: 21%

Fat: 14%

Fiber: 13%

Diet: AAFCO

Why we recommended it: Royal Canin Gastrointestinal 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 constipation 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 Constipation

Flavor: Chicken

Protein: 25%

Fat: 16%

Fiber: 5%

Diet: AAFCO

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 constipation 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.

Best Wet Dog Food for Constipation

Flavor: Chicken

Protein: 34%

Fat: 13%

Fiber: 13%

Diet: AAFCO

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 most dogs love.

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 Food For Senior Dogs with Constipation

Flavor: Pollock

Protein: 26%

Fat: 6.5%

Fiber: 10%

Diet: AAFCO

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 relieve constipation 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.

Best Large Breed Dog Food for Constipation

Flavor: Chicken & turkey

Protein: 27%

Fat: 13%

Fiber: 6%

Diet: AAFCO

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 and constipation relief, 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 Constipation

Flavor: Turkey

Protein: 33%

Fat: 10%

Fiber: 8%

Diet: AAFCO

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 and constipation aid.

Best High-Protein Dog Food for Constipation

Flavor: Chicken

Protein: 30%

Fat: 10%

Fiber: 10%

Diet: AAFCO

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: What sets this food apart is its high protein content for a weight management formula—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 Food for Allergic Dogs With Constipation

Flavor: Lamb

Protein: 18%

Fat: 6%

Fiber: 8%

Diet: AAFCO

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 constipation. It also offers excellent value for a limited-ingredient, high-fiber food without relying on grain-free marketing.

The Bottom Line

Constipation in dogs can often be eased—and even prevented—by choosing the right diet. Foods rich in natural fiber, prebiotics, and easily digestible proteins help support regular bowel movements while also improving overall gut health. Every dog is different, so it may take some trial and error to find the formula that works best for your pup. If constipation persists despite dietary changes, always consult your veterinarian to rule out underlying health issues and ensure your dog receives the care they need. With the right nutrition, you can keep your dog comfortable, healthy, and thriving.

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Sources

Canine Bible uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process and product review methodology to learn more about how we fact-check, test products, and keep our content accurate, reliable, and trustworthy.

1. Balance of saccharolysis and proteolysis underpins improvements in stool quality induced by adding a fiber bundle containing bound polyphenols to either hydrolyzed meat or grain-rich foods
2. Adding a polyphenol-rich fiber bundle to food impacts the gastrointestinal microbiome and metabolome in dogs
3. Feeding Fiber-Bound Polyphenol Ingredients at Different Levels Modulates Colonic Postbiotics to Improve Gut Health in Dogs
4. A prospective multicenter study of the efficacy of a fiber-supplemented dietary intervention in dogs with chronic large bowel diarrhea
5. Select Dietary Fiber Sources Improve Stool Parameters, Decrease Fecal Putrefactive Metabolites, and Deliver Antioxidant and Anti-inflammatory Plant Polyphenols to the Lower Gastrointestinal Tract of Adult Dogs
6. Dietary supplementation with fiber, “biotics,” and spray-dried plasma affects apparent total tract macronutrient digestibility and the fecal characteristics, fecal microbiota, and immune function of adult dogs