Why is my cat throwing up so much? This is not just the simple hair balls, he's completely puking, sometimes two to three times a day. Some days he doesn't puke at all, but he is still puking, what's wrong with my cat Oreo? When he throws up its orangish in color and it looks like all of his food is there too. It almost looks as if he isn't really chewing his food either. I have used the same brand of food since they were born, (I have three cats total, all from the same litter) Special Kitty brand food from Wal-Mart. The only thing I've changed is that I went from the original to gourmet, but that was like 4-5 months ago if not longer already. So I don't know why he is doing this. He started puking about 2-2 1/2 weeks ago I believe. He stopped doing it for a couple of days but he started doing it again yesterday and he puked 3 times. Please help me, what's wrong with Oreo?