My 2-1/2 year old cat is throwing up about once a day. The vomit can be undigested dry food, brown slime or clear liquid. His poop seems normal and he seems healthy and acts normal otherwise. This has been going on since we moved 2 months ago to 7,000 feet altitude and I don't think he was doing it before we moved but the house was so jumbled for the last months I'm not sure. My other cats are not throwing up except for hairballs. Four years ago I had a cat with acute pancreatis so this worries me.