if the smaller one's are banty's then they will be able to hold there own in a fight i have banty's and standard's free range together during the day the hens probably wont do much damage to one another but the rooster's will probably fight until they determine who's the boss espacially with your rooster's they are a not so fighty breed if my roo's got at one another they'd probably kill each other but that's just because i raise game chickens and oeg's

I continued to let them free range for a few hours before bed every day for another week or so and then one night, I just closed the tractor coop. They were definitely confused, and ran around the thing in circles for a while looking for a way in, but a couple of them actually went to the big coop on their own. The rest I carried over. I locked the run but left the coop open so they could work it out. When I went out an hour or so later, they were all settled in. I had to laugh because my top hen decided to corner them all on the floor for the night, to assert herself I guess. But no one was hurt and the next night night, they all slept together on our new and improved roost (the poop board thread on this site is worth following too)! That was over a week ago and all is well today. My older rooster is loving his new little buff cochin lady... poor little girl. And the little rooster has learned to keep to himself.... for now. 
