Rascal has some serious stomach issues. The last time we fell off the wagon and didn't monitor her food intake well she developed pancreatitis. One piece of information our vet gave us, that I've begun to follow religiously, is to check the fat content in all of your treats and food. For a sensitive stomach it should be around 4-6 percent. Anything more is hard on the digestive tract. After checking most of the treats in the food aisle, and believe me I have, you'll see that the range falls anywhere from 4 up to 16 percent fat or more.