A dog with gastritis needs bland, low-fat food served in small, frequent meals to let the stomach lining heal. The goal is simple: reduce the work the stomach has to do while still providing enough nutrition for recovery. Most cases of acute gastritis improve within a few days on the right diet, but knowing exactly what to offer (and what to avoid) makes a real difference in how quickly your dog bounces back.
Start With a Brief Fast
Before changing what you feed, you may need to temporarily stop feeding altogether. Withholding food for 24 to 48 hours, while still offering water, gives the stomach a chance to rest and is often enough to resolve simple cases of acute gastritis on its own. This period of “gastric rest” lets inflammation settle before you ask the digestive system to process food again.
Keep fresh water available throughout the fast. Dogs that have been vomiting lose fluids quickly, and dehydration can become a bigger problem than the gastritis itself. If your dog won’t drink plain water, unsalted bone broth made with dog-safe ingredients (no onion, garlic, or added salt) can encourage fluid intake while providing minerals like magnesium and calcium. Check the label carefully on store-bought broths, since many contain onion or garlic powder.
The Bland Diet: What to Cook
Once the fasting period is over, the standard recovery meal is a 1:1 mix of a lean protein and a simple carbohydrate. That means equal parts by volume, not by weight. The protein and carb options are straightforward:
- Proteins: Boiled skinless, boneless chicken breast; boiled lean ground turkey; or boiled lean ground beef with the fat drained off. No seasoning, no oil, no butter.
- Carbohydrates: Plain cooked white rice or peeled, boiled, mashed potatoes. White rice is the most common choice because it’s gentle on the stomach and easy to digest.
Cut the chicken into bite-sized pieces and mix it into the rice so your dog gets both components in every mouthful. The blandness is the point. Fat slows the passage of food from the stomach into the intestines, and that delay can increase discomfort and worsen symptoms. Lean proteins and plain starches move through the digestive tract with minimal friction.
How Much and How Often to Feed
Rather than offering one or two normal-sized meals, split your dog’s daily food into four to six smaller portions spread throughout the day. A stomach that’s been inflamed can’t handle a full meal without potentially triggering another round of vomiting or nausea. Smaller volumes are easier to process and less likely to cause a setback.
Start with about half your dog’s normal daily intake on the first day of refeeding, then gradually increase over the next two to three days until you’re back to a full day’s worth of food. Use a measuring cup or kitchen scale so you’re consistent. If your dog tolerates the first few small meals without vomiting, that’s a good sign the stomach is settling.
Even after recovery, dogs prone to stomach issues often do better on three meals a day rather than two. Dogs with conditions like gastric reflux are especially prone to flare-ups when their stomach sits empty for too long, so a midday meal or bedtime snack can help.
Adding Pumpkin for Fiber
Canned pure pumpkin (not pumpkin pie filling, which contains sugar and spices) is a common addition to the bland diet, especially if your dog has diarrhea alongside the gastritis. Pumpkin contains a mix of soluble and insoluble fiber that can help firm up loose stools. Add 1 to 2 teaspoons per meal for small dogs. Larger dogs can handle up to a tablespoon or two, though there’s no precise weight-based formula that’s been standardized.
Pumpkin isn’t a cure-all. Nutrition researchers at Tufts University note that the fiber blend in pumpkin may not match what’s found in therapeutic veterinary diets, so it works best as a mild supplement rather than a primary treatment for ongoing digestive problems.
Probiotics During Recovery
Probiotic supplements can speed up recovery. In a randomized, placebo-controlled study on puppies with gastroenteritis, those given a multi-strain probiotic blend daily for seven days had dramatically better outcomes: 70% achieved excellent recovery, compared to a control group where over a third had poor recovery and another 30% showed only fair improvement. The probiotic group also normalized stool consistency faster.
Look for canine-specific probiotic products that contain multiple strains of lactobacilli. These are widely available as powders or chews designed to be mixed into food. Starting probiotics early in the recovery process, alongside the bland diet, gives your dog the best chance of a quick turnaround.
Foods That Will Make Things Worse
A dog with an inflamed stomach is far more sensitive to dietary triggers than a healthy dog. Some of the most common offenders are things people don’t think twice about sharing:
- Fatty foods: Fat trimmings from meat, fried scraps, or greasy table food. Fat delays stomach emptying and can trigger pancreatitis on top of the gastritis.
- Dairy: Milk, cheese, and ice cream can cause diarrhea and additional digestive upset.
- Onions and garlic: Toxic to dogs in all forms, whether raw, cooked, powdered, or dehydrated. These are hidden in many prepared foods and broths.
- Chocolate: Causes vomiting and diarrhea even in small amounts.
- Salty foods: Excess salt worsens vomiting and diarrhea and can cause more serious symptoms like tremors.
- Raw meat or eggs: The risk of bacterial contamination from salmonella or E. coli is the last thing a dog with a compromised stomach needs.
- Spices and seasonings: Large amounts of nutmeg, baking powder, baking soda, and other spices are toxic. Even mild seasonings can irritate an already inflamed stomach lining.
Transitioning Back to Regular Food
Most dogs with acute gastritis can start moving back to their normal diet after three to five days on the bland diet, assuming symptoms have fully resolved. Don’t switch back all at once. The American Animal Hospital Association recommends a seven-day transition: start by replacing about 25% of the bland food with the regular diet, then gradually increase the proportion of regular food each day.
A typical schedule looks like this: days one and two at 25% regular food, days three and four at 50%, days five and six at 75%, and full regular diet by day seven. If vomiting or diarrhea returns at any stage, drop back to the previous ratio for another day or two before trying again.
If symptoms come back every time you reintroduce the regular diet, that’s a sign something else may be going on. Food sensitivities, chronic gastritis, or inflammatory bowel disease all require a different approach than a short-term bland diet can provide.
When Gastritis Becomes Chronic
Some dogs develop recurring or persistent gastritis that doesn’t resolve with a few days of bland food. Chronic cases often benefit from a hydrolyzed protein diet, which is a commercially prepared food where the proteins have been broken down into fragments too small to trigger an immune response. These diets are clinically effective for long-term management of food-responsive digestive diseases and inflammatory bowel disease in dogs. Your vet can recommend a specific hydrolyzed diet, and some dogs stay on these formulas permanently.
Novel protein diets, which use a protein source your dog has never eaten before (like venison, rabbit, or duck), are another option for dogs whose gastritis turns out to be driven by a food sensitivity. The idea is to avoid whatever ingredient is provoking the inflammatory response.
Signs That Need Veterinary Attention
If your dog vomits blood, passes dark tarry stools, or shows symptoms that persist or worsen during the fasting period, diet changes alone aren’t enough. Blood in vomit or stool suggests significant ulceration of the stomach lining, which requires a veterinary exam and possibly imaging to assess the damage. Similarly, if symptoms return as soon as food is reintroduced after a fast, that warrants more extensive testing rather than just repeating the bland diet cycle. Uncomplicated acute gastritis typically resolves on its own with rest and careful refeeding, but the key word is “uncomplicated.” A dog that isn’t improving within 48 hours is telling you something more is going on.