Most respiratory diseases in chickens are chronic and make them carriers for life--but you have 6 chickens, and they have probably all been exposed already. So if it is mycoplasma gallisepticum or CRD, you can treat it with an antibiotic, and it may or may not come back. Yes they will all be carriers, and you can't sell hatching eggs or sell/give away the chickens, but they may be fine and lay you nice eggs and be good pets. Many people have had MG, and they just maintain a closed flock. New birds can be vaccinated, also. Do some reading about MG and take your time making any long term decisions. Here is a good link for info: http://umaine.edu/livestock/poultry/mycoplasma-gallisepticum-faq/So are you suggesting that I cull the sick chicken to save the remainder of the flock from infection? I try my best to run an organic/antibiotic free backyard free range chicken community but I am willing to medicate if necessary to save a birds' life. However if as you say they will not be truly healed and I am risking infection to the remainder of my flock then I would likely pursue the greater good.
Also, I am not sure how my chicken could have become infected. I have had the same 6 chickens since birth (they are about 7 months old now) with no introduction of other birds, (aside from the sparrows, robins, etc... that are freely in my back yard), chicken keepers to my backyard, or other chicken operations in my neighborhood. Any ideas as to how they could have become infected? How certain are we that this is a respiratory infection given that i haven't taken any of the risks that commonly result in a respiratory infection. (Bringing in new birds etc...)
Thank you all again for your help on this!
Here is a long thread on people's experience with MG: https://www.backyardchickens.com/t/181490/my-experience-dealing-with-mg-mycoplasma-gallispectum
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