Have a Golden Comet around a year old now. We recently had polish roosters who were aggressive the my hens and have now been gotten rid of for about a month
This is the only chicken the feathers haven't grown back on yet.
Any clue??
No mites or bugs I use DE once a month or so and spread throughout all coops and nesting boxes. This is from a aggressive rooster really. Just making sure the chicken is healthy.