I have a nine year old Siamese cat that started puking a few months ago. I brought him to the vet, and they did all of the expensive blood work, etc., and sent me home. Well, he is still puking, and $189.00 later, I have no idea what to feed him. The puking seemed to increase with indoor, hairball formula food. I switched to Science Diet, at the advice of the vet, and now there is puke all over the house. I do give him wet food, which does not seem to aggravate the condition. But, I am unable to be home all of the time to give him wet food. Helppppp......should I change to regular dry food? I have no idea what to do.