X2 on separate housing if a gander is involved especially...Recently saw someone thinking about putting down a duck after a gander had a go at her. Deciding whether to eat an injured bird or not. They decided to give her a chance to recover. And ducks ARE hardy. But why risk it? My ducks were MUCH louder than my chickens... and hilarious to saying "whack, whack, wack". Not all the time though, more like when you approach. We thought they were working for the mafia.
As far as I'm concerned ducks don't house well with chickens either.
Don't know about the whole pairs thing... But I always see them flying in a flock not alone.
Better provide separate house and yard before that happens. It's brutal and can be too late by the time you figure it out. Once hormones kick in all bets are off!![]()