I started out with 4 chicks, almost 3 years ago. 2 Buff Orpingtons and 2 Plymouth Rocks. Last year, I lost one of the Orpingtons from unknown reasons and the other day, I lost one of the Plymouth Rock from a skunk attack. I would like to replace the two chickens, but am interested in getting a different breed. I will be getting chicks. I was wondering if the Ameraucana would fit in with the 3 year old Orpington and Plymouth Rock. Our run is 30' X 5' and the coop is 4'X4' plenty room for 4 chickens.