New Kitten - throwing up today, no appetite -- what to do?

A week and a half ago I rescued a 10-12 wk old Maine Coon female kitten. Took her to my Vet that day, she was give first dose of dewormer (due for last dose this week), Metronidazole (Flagyl) twice a day x 7 days for diarrhea she had, an injection of Convenia as she had an injured tail (end of it missing, some tissue dead, some pus coming from it), some subQ fluids as she was found to be 8% dehydrated. She's done super well, a real ball of energy. She's been eating like a little piggy, canned mostly.

This past week the end of her tail, which Vet though might just 'fall off' on its own, became painful to her and I took her to vet where she clipped area and lots of pus. Due to this she definitely needed surgery to remove half of her tail. She had this surgery done (Vet figured might as well spay her, too at the same time, and microchip her) on Thurs Oct 4th. She did very well following the surgery, you wouldn't even know she had surgery - bright, active, good appetite.............until today. This morning she threw up a little bit of clearish liquid. Then a few minutes later a little more. She wasn't interested in eating (last ate canned food this early morning). Her and I had a 2 hour nap in the sun :-) I woke up to her making that typical little "cry" cats make when going to throw up.......and she made the motions of throwing up but nothing came up. She's bright and active but has no interest at all in food, and I've opened about 4 different cans, nothing.

She's continued to have loose-ish poops since I rescued her, I had them do a fecal test a few days ago and it came up negative for everything (including Coccidia, worms, parasites, etc). I've been giving her FortiFlora power (probiotic) with her food the past couple of days and for the first time this morning I noted one of her poops was rather formed.

I have a cat w/ kidney disease who I give daily subQ fluids to, and Vet did tell me I could give some fluids to kitten if I ever felt she was dehydrated (I know how to assess for this). I tried giving her 50ccs of subQ fluids this afternoon but that didn't work out too well, I think most of it just leaked back out :(

Due to the long weekend here in Canada (Thanksgiving), the only place I could take her is to a 24 hr Emergency Vet Hospital. I'm surely not opposed to that but I don't want to overreact. I'm going to go out soon and buy some Fancy Feast canned as that one she seems to like above all others.

I can't think of any 'foreign object' she might have eaten, I have other indoor cats and I keep my house pretty cat-proof. Her belly at her spay site is fine and healing. The end of her tail where they amputated, it's good with stitches intact.

I'm not opposed to mixing up some canned food into a slurry and syringe feeding it to her......but if she's nauseated or something else is going on, not sure if force-feeding her is the answer except from a hydration standpoint?

What would you do?

Thank you so much

If she is happy & active I wouldn't even try to feed her for the rest of the day,we wouldn't want to down a heavy meal after throwing up tummy too sore & she is most probaly doing her own starvation,fluids at the moment is the main thing but if she isn't drinking then also to start with do that by mouth not sub cut because if she keeps throwing fluids back then I would say you might have a problem with her but if she keeps them down its a better indication that its "one of those things" that is going to pass through her system & she will be back to normal pretty quickly,try her with good old plain fish or chicken a few hours down the line its a lot easier to digest {not sure about time difference here could already be down the line....} ....x

I agree with everything Jackie has said above. Also she may just have a little furball or it could possibly the fact that everything is now just catching up with her. I mean she's been through a heck of a lot in her short life so far, the poor little mite. But it sounds as if she is in really good hands and I for one applaud you for everything you are doing for her.

Hello hello!
Thank you so much for the responses. Well, I have no idea what her issue was yesterday but last evening I went out and bought some Fancy Feast canned food and she ate like a piggy. At very well this morning, too. While she was not wanting to eat yesterday, I did slowly/carefully syringe small amounts of water into her and she kept it down. Don't know what was going on with her yesterday but I'm so thankful that she's fine now.....for her sake, and for the sake of my wallet as I've spent $1200 on her over the past 1.5 weeks and I'm kinda tapped out :-). I'm letting her spend supervised time downstairs in my living room so she can get used to my other 5 adult cats. It's going very well. They're all quite intrigued with this little rambunctious ball of fur. This like to sit a couple of feet away from her and watch her play.....maybe they're thinking "back in the day when I was that young....." LOL

Attached are some pics I just took :-)Attachment 6391Attachment 6392Attachment 6393

Okay, I spoke too soon LOL. She had a good play then meandered down to my basement (it's a finished basement) and she was growling a bit at my other cats as there are a lot of obstacles and pieces of furniture to sort of hide behind and she didn't like them walking from around the corner and catching her by surprise. I brought her back upstairs and whammo.....she threw up everything she'd eaten earlier. Decided maybe it was the stress of the other cats and so much playing and exploring new places? ...so I took her up to her room where she quickly found her way to the plate of cat food and began eating away so tummy must not be upset. Could stress cause this throwing up? Overstimulation?