Board Thread:General Discussion/@comment-72.161.235.175-20150929151551/@comment-24994749-20151016055926

ChishioKunrin wrote: There are featherless chickens. They were bred to have no feathers because chicken butcheries tend to cause a lot of pollution due to the feathers they strip from the chickens they kill. In the winter, they put sweaters on the chickens so they don't die of hypothermia. That's an interesting fact...

Still, they are a product of man selective breeding and they wouldn't survive on the wild, so not sure if it counts.

Still, I'm almost sure bird don't have hair, at least not in the same sense mammals do.