I have 3 pekin ducklings. Not sure of their sex, but I want to her a couple more ducks of all different breeds. The problem is im scared I'll have a drake pekin and with pekins being so big I'm worried it would hurt a hen of a different (smaller) breed. I thought it would be best to introduce them all to each other while they're still young so the new ones wouldn't be bullied. I'm wanting to add: Cayuga, blue swede, and a welsh. Any thoughts?