Medium sized chickens

Don't put older and younger chickens together fighting may occur. Or the older ones will
guard the feeder and not let the younger ones eat.

If you have more than one size of chicken you might want to consider building a small building with a perch inside. Base how big of a flock you have as to how big you want it to be.

Keep a close eye out for any cuts or anything you might see. Because the chickens will peck even more on another with a cut. If it does happen follow these instructions:

http://www.dummies.com/how-to/content/how-to-treat-cuts-and-wounds-in-chickens.html