My kitty is a year old. Has had two bouts of blood tinged vomiting. Vet put her on Hills ZD.She was fine with that for four months ,stopped even touching the ZD .So I gave her Friskies ,chicken/gravy,finely chopped a few times daily. That went well for one week. Now we are back to square 1.She began vomiting after four days of eating Friskies can food(which she loves)Took her to the vet. She gave her a shot to help stop nausea and an appetite stimulator pill. She hates the ZD. They put her on AD. But only until Monday. I don't know what she will eat after that!