My 5 year old (or so) male cat had struvite stones removed from his bladder in January, and was put on feline c/d - for the rest of his life (I think vets get some kind of compensation for saying stuff like that, but anyway). He's been on the dry c/d since then, but last week he started throwing up not long after he ate. This went on for about 3 days. I took him to the vet on Sunday and they gave him pepsid and canned i/d food for a few days. He did perfectly fine on it. I started incorporating his old food back in, about 10 pieces mixed in with the wet i/d and he threw up last night. He's still taking the pepsid. Could he have suddenly developed an aversion to the dry c/d? I'm wondering if switching him to canned c/d would help. I would think it'd be better anyway since he'll get more water, right? He didn't really drink much water while he's been on the canned food. I'm taking him to the vet tomorrow, but I'm really trying to avoid getting a lot of blood work and x-rays taken.