I have a 4 year old female cat, she is quite overweight the vet said a couple of years ago but didn't seem too concerned at that time. Her weight hasn't changed BUT something else has. A bit of history....a couple of years ago i gave her catnip for the first time and noted she did not react well to it! she was so sick after and it took a good week of her vomiting, being lethargic and not well before she got better, wasn't sure if it was the catnip but she recovered fine. A few weeks ago i gave my other cat catnip and the one that "may" have gotten sick from it before had a few sniffs and rolls but for the most part left it alone, i also didn't want to give her too much as i wasn't sure if that's what caused problems before. Sure enough she was vomiting by night i felt awful because it looked like it was the catnip that doesn't agree with her but now the problem has gone on too long for it to be that. She wasn't as bad as the first time but the vomiting hasn't gone away:/ idk if it's coincidence at this point but now i'm getting concerned. She eats, drinks, acts and has BM that are normal BUT almost every day (hard to tell with the other cat in the house) she is vomiting and nothing comes up but clear fluids and sometimes it is yellow. Because she was acting fine and we are never 100% sure if it's the other cats vomit, we've been keeping an eye on her, but other than the vomiting she seems fine. Now this is where the problem comes into play. When she does try to expel, she gets VERY agitated! she is normally a VERY quiet cat but we always know when she's going to vomit because she howls and howls and sure enough the heaving starts, which is quite extreme and liquid comes out. Yesterday though my son informed me he found vomit tinged with pink and that can not be good! I feel as though she has the worlds biggest hairball she can't bring up and maybe that's all it is? I don't think at this point it's the catnip anymore, but idk because of the coincidence. She is totally acting normal otherwise though. No other issues with her. i DO HAVE A VET APPOINTMENT to make it clear as usually posts like this get only a response like that, but in the meantime i'm trying to get some idea on what it could be?? The pink vomit could be blood from her trying to vomit too much? or it could be more serious i know but ideas are what i'm trying to get at this point. Could it be as simple as diet? i know it could be as serious as fatty liver because of her size, but am baffled because of her acting fine.