I gave up, and took the divider out of the chicken run. They are now mingling without blood shed in the run. The littles are learning that the bigs are boss. The only difficulty is one little knuckleheaded RCBL who keeps getting on the wrong side of every fence I own... at least I hope it's only one, and not all three... can't tell them apart. Any how, this little squeezes through the electro net, has gotten into the garden, and is always getting into the big girl's side of the coop, and then can't find her way back out... not a pretty picture when one or more of the big girls decide that she shouldn't be there! Unfortunately, I have to work every day this week. So not sure how the day will go without me around to keep the littles out of trouble with the bigs...