You can get bantam EEs or bantam barred rocks, either should give decent amount of eggs and be capable of handling the weather extremes you have. Of course, bantam usually lay much smaller eggs.
I just realized that if my birchen roo is carrying wheaten, and the cross with duck wing produced blacks and duckwing wheaten splits, the blacks would be birchen and duckwing, so instead of using the offspring that appeared duckwing, I can breed the black (the birchen x duckwing) back to my...
If the large eggs are average size (whatever that weight may be) to the hen it's fine. You just want to incubate average eggs, not the usually small or usually large.
Have never seen anything like that before, so I would say, no, that's not normal. Maybe someone else has seen something similar and has an idea of what that is, a cause, and hopefully a solution. Sorry I can't be of any help.
Interesting. The recognized colors/patterns of Bruges leads me to believe there should not be wheaten? I don't know enough about color genetics though to be sure.
Recognized Colors: black, white, blue, black gold-necked, blue gold-necked, black silver-necked, golden birchen, blue-gold birchen...
My pullet went through quite a metamorphosis over time, and I had thought that she was a 'he' because there was so much red across the shoulders (compared to a male in pic here), looking into that I discovered the wheaten gene. I learn more every day 😁