I have 5 rouen ducks. they are about 4 months old and the males are just starting to get their feathers. I love them so much but I really want to get some other ducks to hatch. I was wondering if rouens would attack any other duck type. I was looking at getting call ducks or east indies ducks. Please tell me if Rouens get along with others, specifically those, and if so how would I introduce the new ducks into their habitat without freaking them out?