Sabella-
Hang in there. We all want to encourage you to do what's right for you and the well-being of your flock for now and in the future. I think that's why chicken keeping is so gratifying, that so many individuals with so many different philosophies and husbandry styles are successful at keeping happy and healthy birds.
So sorry you are having to deal with this on your first go, but it will put you in better stead for your future endeavours. It is really admirable that you have an interest in continuing on with poultry keeping even if you find that culling is the best option for you. The fact that there is no odor with their symptoms is a good sign. There are about 1/2 dozen respiratory diseases/conditions that effect chickens from chronic to acute. Some are no more serious than a human cold; some are the outcome of allergies.....really. (Though a reputable breeder should still not be selling them.) Without a diagnostic blood test to ascertain your birds' condition, they could have something that is fully treatable or could have something that will be part of their physiology for their lifetime. For instance, humans once they have the herpes virus always carry it, but may only have one outbreak in their lifetime. This does not mean that they are chronically ill. If all birds are kept away from any and all suspicious health sources, they will lose their disease immunity and vigor. I think there is a prevalence of this with people following modern biosecurity measures. (Though I do feel it is advisable to be NPIP certified as a breeder, as well as maintaining clean conditions with poultry keeping.)
The birds that I have treated for respiratory issues in the past are all doing well, laying eggs, and having generally happy chicken lives. They have since had blood tests, and a clean bill of health.
Hang in there. We all want to encourage you to do what's right for you and the well-being of your flock for now and in the future. I think that's why chicken keeping is so gratifying, that so many individuals with so many different philosophies and husbandry styles are successful at keeping happy and healthy birds.
So sorry you are having to deal with this on your first go, but it will put you in better stead for your future endeavours. It is really admirable that you have an interest in continuing on with poultry keeping even if you find that culling is the best option for you. The fact that there is no odor with their symptoms is a good sign. There are about 1/2 dozen respiratory diseases/conditions that effect chickens from chronic to acute. Some are no more serious than a human cold; some are the outcome of allergies.....really. (Though a reputable breeder should still not be selling them.) Without a diagnostic blood test to ascertain your birds' condition, they could have something that is fully treatable or could have something that will be part of their physiology for their lifetime. For instance, humans once they have the herpes virus always carry it, but may only have one outbreak in their lifetime. This does not mean that they are chronically ill. If all birds are kept away from any and all suspicious health sources, they will lose their disease immunity and vigor. I think there is a prevalence of this with people following modern biosecurity measures. (Though I do feel it is advisable to be NPIP certified as a breeder, as well as maintaining clean conditions with poultry keeping.)
The birds that I have treated for respiratory issues in the past are all doing well, laying eggs, and having generally happy chicken lives. They have since had blood tests, and a clean bill of health.