Half feathered, half not.

[johnnymac221]

I had a chick die unexpectedly the other day. Probably a month and half to two months old. Looked fine, acted fine. I picked it up and under its left wing he had a lack of down like under the right wing. Any ideas here? My other chicks haven't been effected by anything.

 

[TwoCrows]

Mites can cause loss of feathers and will drain the life out of a bird. Check your other birds for mites to confirm that this one may have died from mites. The feather loss could be totally unrelated. I am sorry for your loss.