I've got a Saxony drake (8 lbs) and a WH drake (5 lbs) and they are are with Saxony and WH hens (7 and 4 lbs). This past summer I had some issues with one of the WH hens getting over-mated. She had feather loss/damage and, at one point, a leg injury. The other ladies had a bit of feather damage but nothing significant. I raised more hens to add to the flock to hopefully relieve some of the pressure.
I think my problem had more to do with numbers that with weights but I would not put drakes and hens with a larger size gap together.
I think my problem had more to do with numbers that with weights but I would not put drakes and hens with a larger size gap together.