I had my 8 month old male rescue kitty to the vet today due to not eating, drooling, sneezing, and lethargy. He was given an injection of fluids to treat dehydration, an injection to help with nausea if that was the cause of the drooling, and antibiotics. She suspects a URI. I'm very concerned because it's been over 4 hours and the drooling hasn't subsided and he still hasn't eaten. I'll be feeding him baby food via a syringe if he doesn't eat by 8 as recommended by the vet. I'm wondering if anyone can give me some sort of idea on how long the medications could take to work and at what point should I consider taking him back if he doesn't improve. Thanks for any help, I'm feeling so helpless about the little guy. I should also add that the vet told me two kittens (much younger than mine) came to the office with the same symptoms and didn't make it. This is adding to my panic.