One drake with three ducks is the absolute minimum! Otherwise you will end up with over-breed ducks and fighting drakes. The breed itself is not important - ok a Jumbo Pekin drake with mallard ducks might not be such a good idea, but generally all domesticated ducks get along with each other and crossbreed happily.Thank you for your reply!
So could I do something like three hens and one drake of pekins, mallards, and rouens? Will they cross breed?