I got some eggs off of a friend and I had this to come out of a white egg she also has feathers coming out of her feet. I know for sure he didn't have cochins!!!
it doesnt have any feather legged parent if it did it should have at least a few feathers on the legs but it doesnt have any...its possible that its a mixed of those 2 breeds
depends on their background as well they may be mixed with some other breed that their owner doesnt know about...does anyone else around your friend own chickens that may have jumped the fence?