I have read through the forum and I know this has been discussed, but I am still not sure what to do. I have a Maran about 10 weeks old and 2 Silkies about 9 weeks old. I just got 3 (a Leghorn, a Wydonette, and a Red Star) about 12 weeks old and much bigger than the original 3. How long will they peck at each other? The new ones seem to ignore the silkies, they peck at the maran (she was the top chicken for the last week). I left the new ones in a crate in the coop for a while and then let them out supervised, they grazed and ate...pecking at the others for about 45 minutes....I decided to re-crate the new ones. I am afraid my Maran will be pecked to death...there is alot of squaking and posturing and the pecking. Now what????? Update...I have seperated the run into a back section and have the 3 new ones away from the old ones. How long to keep them seperated? Everyday should I put them together? When can I put them in the henhouse together? If I do it tonight after the ols ones are sleeping will it cause a problem? The older ones are smaller than the new ones, is that an issue? Who new this would be so hard??