I've received these two black chickens(most likely hens) from my grandpa in the mountains. They are both slender and the legs are macaular. They fly high to the trees and are very agile. My other rooster Mochi seems young. Is he a leghorn? I've noticed my older roosters weren't leghorns. However, they were white but didn't have the full look like a leghorn does. What breed is my rooster and is he sexually mature yet? He also hasn't crowed yet.. I'm not sure how old he is because I received it from mutal friends.