Have a dove that has been treated for chlamydia?

Over the last 3 or 4 months i have noticed my pigeons have no appetite, from then on they suffer from different symptoms and death?

My pigeons have always sputum in the throat, and I can not eliminate it. I've tried to various forms, but can not?

The birds drink water and the water stays in the crop. The birds crop swells and the bird will die. Could you advise?

What can I give my pigeons to stop a yeast infection?

My pigeons have fungus. How can I treat them?

Can yeast be diagnosed via a crop swab, and how do I treat it?

My pigeons make a lot of noises when they breath, and also seem to puff their chests with air. How can I cure them?