roos feathers are greasy @ some missing.

[fatboys farm]

my roos, 1 french black copper maran @ 1 jersey giant. they seem to have very greasy feathers and missing some like tail feathers @ around the neck. they are fat @ healthy. none of the chicks have this problem. seriously confused.

 

[The Chickens' Maid]

I don't think I can help, but I'll bump your post up.