Quick question: When BJ was seen by the vet, can you just remind me what tests were done? Blood work? Sample of nasal mucous taken? I'm wondering on what basis the vet prescribed the ABs (which ones is BJ on now?). You mentioned that the vet expects improvement by tomorrow, otherwise he will add more meds - did he say which ones?
I hear your concerns. Ironically, the inappetance is an argument both against *and* for a fattened/increased dose: No food + High BGs = Greater risk of DKA. While BJ luckily has no DKA-history, this is still a factor that keeps popping up in my mind. (Have you got ketosticks, just in case? Could you get a urine test?)