My Toonces, has what the vet has described as a sensitive stomache. I can't feed her milk, she throws up. I can't feed her tuna, she throws up. And sometimes after eating (she only eats dry) she throws up. Now these are not hairballs, I have seen her and the others hairballs. So, I have experimented with different foods, the sensitive stomach, lamb & rice, hairball control, and several others. The only thing I have found that helps is the size of the pieces. The smaller the pieces the easier it is on her tummy. Purina One has a formula where the pieces are just a bit bigger than a rice kernel. She does really well with that, I find throw up much less now. I was wondering if anyone knows of a food that has even smaller pieces? I know Hill's Science Diet has vey small pieces but there is something about their formulas that makes her through up that food and I don't want to feed her can.