Last week I spent most of the week on a trip that was mandatory for one of my university courses, and I returned on Saturday. The following morning, I was surprised to see that one of my chickens was missing a large amount of its feathers. No part of its body was completely naked, but the lack of many feathers was still noticeable. My family was taking care of my chickens while I was away, and they have no idea how it happened. The problem can't be mites, because none of my other chickens are losing feathers. The problem can't be age-related, as the chicken is only about two-and-a-half years old. It is unlikely that a predator attacked it; the neighbours' cat hangs around my property on a daily basis, but it never bothers my chickens, and cats other than that cat only visit my property on rare occasions now. There is a handful of other predators that could be responsible that exist in my area, but none of them are likely to occur on my property (it's also important to note that there are no snakes, foxes, coyotes, raccoons, opossums, or skunks here). Tomorrow will mark one week since I first found this chicken in its current condition. I think that it has already grown some feathers back, which is good. I haven't noticed any changes in its behaviour.