I'm curious whether I can do this or not - and if not, the reasoning. I know Roo's should not be among young pullets because they will harm them physically due to the size difference in birds, but does this apply when the roo is a small breed (not necessarily bantam) and the pullets are the same size as he is? My pullets are 11 1/2 wees old and large bodied already. My roo is a Polish over a year old, and basically the same size as the pullets. Will he hurt them?