Wondering if anyone has any thoughts on this ... Our 11 year old cat, Onyx, became lethargic late Sunday night. It continued all through Monday and at first I thought she was just tired from playing on Sunday with our other 2 furkittens, but it got so that I was worried enough to call the vet Mon. afternoon. She was seen and our vet thinks Onyx picked up some nasty virus from our youngest kitten whom just adopted us 2 weeks ago from a local shelter. Onyx had a 104.5 degree fever. The vet gave her a penicillin shot and antibiotics shot, and sent us home with oral antibiotics and thought Onyx would be better by this morning. Well, the whole day has come and gone and Onyx is, if anything, more lethargic - she's eaten NOTHING or drank NO water today. I'm gonna be on the phone first thing in the morning again. I feel like I should have called the vet today but they said to give it 24 hours .. It's been one long 24 hours though!