I hatched three eggs last year , one turned out to be a roo , i noticed that ( he ) developed quicker than his two sisters,his comb was more pronounced earlyer and his tail feathers also , it was 21 weeks before he tried to find his voice,
good luck
you know how an owl has a ring of feathers around its eyes giving it that look that only owl's have. Well my bird has the same ring of feathers, she is brown with no visable comb yet