I have a 1yr old siamese cat. He is very frisky. a couple of days ago, he started to wretch and cough on and off - ive seen him do this before sometimes, but now he is doing it alot and he seems to be not as vibrant and crazy as before. He plays with alot of toys and opens them and i found the stuffing all over the floor. The other day he was chewing a a piece of wire - he plays with just about everything and carries it in his mouth. I saw him open his mouth a few times to wretch and looked like he wanted to vomit but nothing came out. He also plays with my other cat but they bite each others necks and at times I see him with the other cats fur in his mouth. I called my vet (he is out of town until monday)-I called his referral(he was out of town too)called another vet near me and they dont take emergencies..Is it possible that this is just a big hairball? and what can I do until I do get him to a vet. He is eating and still running around but is quieter and isnt playing much

Optional Information:
Pet's Sex: Male
Pet's Age: 1

Already Tried:
Put some olive oil in his food and took away toys with stuffing.