While what you say is 100% accurate, iv also had a vet give me Amakacin* while culture was being sent off, for a broad spectrum drug while waiting, Once culture came back Amakacin was the correct AB and i was proscribed another 7 shots (every 3 days) But yes a vet that just throws AB is never a good one to go to. They are just after a quick dollar since exotics rarely go to the vet.