These are about 6 weeks old and finally showing feathers. I thought the tails were white but now they all have a tan or brown top to them. I was told they were pekins but now I'm questioning it. I got them from TS and they aren't told what they get in. I just knew they were a larger breed of duckling. What do you all think they could be? I had people guess on a hybrid but being from TS I doubt that very much.