Thread: delacate stomach

Was just wondering if it was normal for a mc to have a delacate stomach; it took years to find a good food for my cat to eat, but if he eats anything besides that he will vomit it back up, mostly undigested. I mix 2 dry foods together; a hairball control with a vitamin & health, and he loves that. However, my roomate uses a prohealth & hairball all-in-one, and my cat just can't stomach it. Normal?