According to blood tests, my cat has a 'delicate' pancreas and she was often sick before she began eating this food. Since she started on Hill's, she no longer has any problems and she has been on this for a couple of years now!
My vet recommended this for my cat, because it had his intestine infected. After a very short time my cat was fine again and hasn't had any problems ever since. The cat also really likes it, which makes the whole thing much easier.