I have a coop about 6 months old. I have 1 golden buff and 1 Rhode Island Red both Jens. About 5-1/2 months old. I want to add another Rhode Island Red hen but it's been living free range since it was born. It's from the same lot of chicks mine came from. My question how do I in introduce I them so they don't kill it. I tried about 2 months ago and it was dead in 2 days. My coop is not free range I live in the city and they do not allow it and its large enough to hold many. I just wanted to start out with just a couple.