I've just converted part of my garden into runs for my animals, and to get the most time out i was wondering if i could let 2 pairs of boars out together without them killing each other, or breaking the bond they have with their housemate? The run is 6ft by 3ft and will have igloos etc in so they can avoid each other, but one pair are brothers so i don't want to break their bond, but if they can go out together they can have twice as much time out. I'm assuming the size of run would be ok for the four as they are all small pigs. Please tell me if i'm wrong on that also.