Smokey seemed like he wasn't feeling good earlier and he's been coughing every once in a while all day... then he threw up a couple minutes ago. He has a lot of fur so I think it might be from a hairball? There was no hair in the vomit though. I've read about the canned pumpkin and the petromalt for preventing hairballs... do they help once the cat has a hairball in his system? Also how much canned pumpkin should be used daily? Do hairballs make the kitty feel bad/sick/tired? Is there anything I can do to make him feel better? Do I have to take his food away? Sorry about so many questions... I've never dealt with a hairball or vomiting before.