The one drake has always had curly drake feathers but the one I just figured out is a drake hasn't developed any curly drake feathers yet but head and butt feathers are turning almost black/green. I expect to see some curls anytime but also I've read that in some small flocks one dominant drake will claim the duck and the less dominant drake can actually loose his curl, so maybe they might not develop at all? Who knows, again I'm just guessing having no prior experience. I bet yours are working out their pecking order, a while back I noticed mine bickering over everything especially water, food and my attention. It lasted a week or two I think. My experience seems quite a bit more mild though, makes me wonder if there's more competition in the bigger flocks so the displays of dominance might be more dramatic? Hopefully yours will work it out quickly.