Welcome to BYC. Antibiotics don't ever cure a respiratory disease, they may only help the symptoms. It can always come back if they are stressed, and they will infect other chickens. The problem with sick chickens is that they won't drink the medicated water when they are sick. Tylan 50 injections may be used as a shot, and some will give it orally. Dosage is 1 ml given 1/4 inch into the breast muscle daily or orally for 3-5 days. Here is a link to read about IB, MG, ILT, and coryza which are the more common respiratory diseases: http://edis.ifas.ufl.edu/ps044I too have a similar problem. I just started raising a few chickens. I recently bought two laying hens to go with my young pullets which I had already purchased at a local auction. I lost one of the pullets due to unknown problems then late last week one of the laying hens which I had purchased at local sales spot developed a respiratory problem. She is very congested and has a hard time breathing. She eats very little and just lays/stands around listlessly. She stays at the water container drinking a lot. Three days ago I started putting Oxytetracycline in their drinking water thinking this would be the cure for her and would prevent my other chickens from getting the same thing. So far she continues to get worse and I am fearful she will die within a few days. If anyone could offer a suggestion I would appreciate it.
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