cat food

I have 2 Ragdolls as a baby my first cat started vomiting Dr. changed his diet from Raw to Hills D/D he stopped That was 1yr. ago now he started again and my other cat 1 yr. old is doing the same. NO hair balls I cant take him to the vet right now it happens just once in a while . They are big ,shiney, and look very healthy can they be over eating? can any body give me some ideas Oh, 3 times a week I give them canned D/D.

I can't help with this but am bumping up your thread so that others will see it.

I think it's kind of tricky with cats. I've been told that cats naturally have sensitive systems, but then again, I'm not sure how this makes sense. What food do you regularly feed them with out the Hills SD D/D food? You could try putting them on a sensitive stomach/systems food. You could try a Limited Ingredient Diet.