We've got 8 americana's (and a rooster grr) that we got from Ideal Poultry on 10/16. That makes them almost 12 weeks old. We have a flock of 14 birds including 2 roosters. I'm wondering if mine are old/big enough to be tossed in with the bigger birds? I plan on dropping them on the roost at night and I'll be around all weekend (drop them in friday night) to monitor. I've never had issues incorporating before. These have been in their own pen outside in the cold and have a wire screen that the other birds have been able to see them through during the day. I think they're getting a little big for their pen and my coop has a heater in the water to keep from freezing (which means less work dealing with freezing water in the smaller birds pen). What are your thoughts?