Feather loss. Caused by a rooster or some other disease?

[fatimastic]

Well have raised a backyard flock, many breeds for 35 years. My experience on feather loss is: molting, mites\parasite s, roosters, other hens, and never had what I thought was a diet problem. Always look for mites (bugs, Parasite s) every month even if there is no feather loss and you don't have to look at EVERY chicken. Molting is a natural growth and can be severe or mild. Breeders back is often spotted with bloody scratches on the back, a few loss of neck feathers is often associated with roosters breeding. if it's only a couple of hens with breeders back and loss of neck feather, suspect a rooster has selected "favourites" he over breeds with. Observe if there are overly aggressive hens that badger a hen with feather loss. I have On occasion increased feed protein to 22 percent. In each case, they all came out just fine. But it can take up to 3 months to get those feathers back. Treat, the suspected cause, see what happens. Observe carefully the behaviour of your flock. Feather loss in my flocks over 35 years ,, has been 90% due to molting, 5% bugs, 5% roosters or other hens.

I strive to experience like yours!!

Nearly all the signs show mites/bugs but I still don't see any bugs. I have checked multiple hens, multiple times, but I still have to encounter them.

https://www.google.com/url?sa=t&sou...FjAKegQIIhAC&usg=AOvVaw3ah6I09ID9Gp94ORsCUpUL
This is the link for the forum where I specifically address mites. Please read that for specific symptoms.