Has there been some sort of hold up in your receiving the Baytril you ordered? Many online sources have dried up lately for Tylan 50, 200, as well as the tylosin powder for pigeons. Have you ever had a state vet necropsy done before after losing a bird? I hope it doesn’t come to that, but the reports that some people have posted here can be very enlightening. I don’t know your location which can be added to your profile page, but in some states, a necropsy can be affordable if you ask about one for a backyard bird.