I have two coops and yards seperate from each other, one holds 12 pullets and hens, and one holds 3 rescued battery hens who are extremely docile and must be kept away from the rest of the flock because they are attacked. This is where i put the three chicks, and they are good with them. Also, I have several areas in the yard where the chicks can go that the larger girls cannot, should they decide to peck at them. I was out there with them the whole time and they were fine. Now, inside the coop, becuase it is much smaller, I have them separated into their bird cage, because i dont want to risk any bad behavior in such close quarters. These three are fully feathered, which is why I began puting them out in the yard to integrate with the other birds. I have 4 others who are not fully feathered yet, so I am keeping them under the light at night. I should also add that the coop is an insulated 6x6 plywood box inside of a fully enclosed barn. Ive read so many posts on here where people have integrated there chicks right about at this age, so thats why I thought it would be safe. Maybe I'd better rethink that.