When Comet had his respiratory infection it took a day or two for him to stop hooting, and Blitzen never caught anything from him - and you know how those two were, where you found one you'd always find the other.
Yeah. That was when the vet chose to give him an injectable dose too and he had me deaf in one ear from screaming so loudly near my neck, bless him. He tolerated the Baytril itself well, though. I don't remember the dose though, sorry, that was in 2017.
All I can offer is support
I don’t have any experience of uri. Sorry. Sending you a hug. . See what the vet says tomorrow. Good luck at the appointment.
I always used to have longer AB courses for Zebedee. Zithromax came in 10 day amounts and he'd finish one lot then at least part of a second. Baytril etc he had at least a week. (We did think his lungs had been damaged by poor care in his first home.)
Hope Elizabeth shows improvement soon