Hen losing feather on back and wings. Suggestions please

[Zahid Ahmad]

I have 7 hens and one rooster. One of the hen is losing its feathers from last week on back and wings and rest of the hens are fine. Eating well. She is almost 1 year old. Pic is uploaded. Is she infected or otherwise

 

[sourland]

She may be the roosters favorite, but in the picture she almost appears to be ill.

 

[Zahid Ahmad]

She is not ill. She was lil wet at the time I clicked the pic. Is it natural to loose feathers if she is roosters favorite..

 

[Rammy]

Yep. Got two in another pen because the rooster just about plucked them from constant mounting.

 

[Zahid Ahmad]

Can't it be a parasite or infection