Beautiful Buffs I only have 2 females but they are a wonderful breed. You might try some Veterycin eye ointment for your drakes eyes help keep them moist. He's gorgeous.
2 drakes can and will gang up on a single duck and drown when both try to mate at the same time.Sorry for your loss. You'll have to watch your drakes around your hens too. When hormones are raging some don't care who they breed with and it's a death sentence for a chicken hen.