Here are my 9 1/2 week old Pekin ducks. They were hatched on Valentine's day (according to the feed store who got them as day old ducklings). They were so scared to come out of the coop so yesterday while all the other birds were out I took the time to chase them out. Once out they quickly found the baby pool I set up and learned to explore. I still don't see any tail curls, but I have noticed some physical difference. One is wider and more stout and the other is thin and tall. Also the fat one loves to get into the water while the tall one prefers to stand on the edge and drink.