One of my cats, Jordan stopped eating and drinking and I took her to the vet a couple days ago, he said that her mouth was sore and had a sore throat and it was a virus and it had to run its course and he did give me some antibiotics to give her if she got worse. My cat Griffin got really sick on Thanksgiving day and we took him in to the emergency vets and then I took him on to my regular vet, he had a really bad Upper Respiritory Infection and he is much better now, 2 others got it and they have recovered also. The vet seems to think that its the same virus thats made Jordans mouth sore, she has no other symptoms, no runny nose, no congestion, etc. The only thing is it seems to be painful for her to swallow and she will not eat, and I'm pretty sure she isnt drinking. She throws up alot, its clear and foamy. I have been syringing her some water, 1 cc at a time onto her tongue trying to keep her hydrated, I give her about 2 syringe fulls at a time, about 12 ccs every couple of hours. I'm very careful about it also, dont want her to inhale any water into her lungs. She is taking it fine, I tried mixing a little canned food with water and made a mush and feeding her that way but she just throws it back up, I think its the feel of it in her mouth that she doesnt like. I have some gel like Nutri-Stat that I have been giving her also because she wont eat. She seems to feel fine, other than the mouth soreness. She is using her scratching pad and all and is urinating in the litter box but only once yesterday though. Has anyone had any experience with mouth ulcers or soreness? I have tried every food imaginable and she will not eat it, she only ate about 4 pieces of dry food yesterday morning and then nothing but what I gave her after that, just the water and the Nutri-Stat. Sorry this is long, but I have never had any experience with a cat with a mouth sore before, and I'm kind of confused about if it is the same virus how come she has none of the other symptoms of an upper resp. infection. When the others had it they had the runny nose, sneezing, etc. but didnt stop eating. She has none of those symptoms other than the sore throat.