I really don't care for giving antibiotic's in the water. You never know if sick birds are going to drink enough and the dose can really vary from day to day. If you don't want to use Tylan 50 as an injectable you can also give it orally, the dose is 1/2 cc per day for 5 days. This avoids injection site issues.
I had infectious bronchitis go through my flock two years ago. I took one bird to the vet who gave me enough meds to treat the whole flock, I had 8 at the time. They all survived and are doing fine. My problem with telling anyone to cull their birds is that these diseases are so common and there are so many of them that you could potentially cull flock after flock of birds every time some come down with some respiratory bug. Many people have some kind of bug in their flock and won't even know it if birds are not symptomatic. Obviously in a larger operation where good egg production or hatching eggs are the main focus then no, you can't treat and maintain a flock that has come down with something. But I really can't discourage any owner of a small flock from treating their birds and keeping them.
I had infectious bronchitis go through my flock two years ago. I took one bird to the vet who gave me enough meds to treat the whole flock, I had 8 at the time. They all survived and are doing fine. My problem with telling anyone to cull their birds is that these diseases are so common and there are so many of them that you could potentially cull flock after flock of birds every time some come down with some respiratory bug. Many people have some kind of bug in their flock and won't even know it if birds are not symptomatic. Obviously in a larger operation where good egg production or hatching eggs are the main focus then no, you can't treat and maintain a flock that has come down with something. But I really can't discourage any owner of a small flock from treating their birds and keeping them.