Food intolerance and ingestion of foreign objects are two main causes of stomach aches in dogs, according to VetInfo. Other possible culprits include intestinal worms, liver or kidney problems, stomach ulcers or tumors, an inflamed pancreas, constipation, and drinking water contaminated with bacteria.
A dog with a stomach ache may be lethargic and refuse to eat or drink, notes VetInfo. He may whine, paw at his stomach, and avoid lying on his stomach. Other symptoms of stomach ache in dogs include constipation, flatulence, bloating, vomiting and diarrhea.
Most stomach aches in dogs are not serious, says VetInfo, and they resolve with minimal treatment. Allow the digestive tract time to settle by withholding food for up to 48 hours, then provide a liquid diet for the next 48 hours. Reintroduce food slowly, offering small amounts of boiled chicken and white rice, suggests Can I Give My Dog? Other bland foods to offer a dog recovering from a stomach ache include pumpkin, oatmeal, carrots, bananas and yogurt.
If the dog is extremely lethargic or produces large amounts of vomit, he may have ingested a poisonous substance, and he requires immediate veterinary evaluation, warns Can I Give My Dog? Veterinarian assistance is also recommended if there is blood in the stool or copious amounts of diarrhea as dogs with diarrhea run the risk of dehydration.