We kill several multi bearded birds on our farms. Generally 1 out of 4 birds we kill will be multi bearded. Our DNR guys say that multi bearded birds come from bearded hens. We do have alot of bearded hens so it makes sense but I don't really know. I had trail cam pics of 2 multi bearded birds this year.
That is interesting. There was actually a bearded hen within 200 yards of my tom when I shot him! I'd seen it there the day prior as well.