Most respiratory diseases including MG, coryza, and ILT will make carriers of your whole flock for life. Infectious bronchitis (IB) will make birds carriers for up to a year. The symptoms they have may be a clue to which disease they have, but some diseases have similar symptoms. They do recover from IB, biput the other diseases are there for life.
If you cull or lose a sick bird some states will do a necropsy for as little as $20, although most are more. Calling them to ask about a test or a necropsy will get you the info. Antibiotics are expensive, and they only treat the bacterial diseases, MG and coryza. The viruses have to run their course. If you are not going to treat them, culling a very sick bird would be the kindest thing.
Have you already added the sick birds to your flock? If so, it may be too late. It is always less expensive to get baby chicks from a hatchery or feed store in the spring, and raise them up yourself, to have healthy chickens laying eggs in 5-6 months. At 3 dollars a chick, that is pretty inexpensive.
If you cull or lose a sick bird some states will do a necropsy for as little as $20, although most are more. Calling them to ask about a test or a necropsy will get you the info. Antibiotics are expensive, and they only treat the bacterial diseases, MG and coryza. The viruses have to run their course. If you are not going to treat them, culling a very sick bird would be the kindest thing.
Have you already added the sick birds to your flock? If so, it may be too late. It is always less expensive to get baby chicks from a hatchery or feed store in the spring, and raise them up yourself, to have healthy chickens laying eggs in 5-6 months. At 3 dollars a chick, that is pretty inexpensive.