They are 2 different breeds bc BA do not have feathered legs, and their legs are slate colored, which would be darker than the feathered leg chick. Cochin, Maran, Brahma are some common breeds with feathered legs. However, Cochin and Brahma usually have more feathers than the pic, at hatch, so perhaps not those breeds. We have Marans and they have feathered legs (French type) and it took a bit to begin to see feathers, so might be a possibility for yours.