Yes, cats do throw up a lot, but there's generally a good reason. Mine do it when they're either introduced (all at once instead of gradually) to new food, or when there is just a particular food that doesn't agree with them even after a slow intro. over a week or so. You have to figure out which is the problem. Of course they can also get sick from eating the wrong thing (not food) they pick up somewhere, and because they are actually ill with something that needs a vet visit.