I have five nine-month-old hens, who will be a full year old by the time spring comes. I'm wanting to get five more little chicks in the springtime, since I easily have room for 10 (or more) in the chicken coop. They will spend some time in a brooder, and then I have a 30 inch by 8 foot by 2 foot tall chicken tractor that I can raise them in while they are growing bigger. But at some point, I will need to merge the five new chickens into the same living quarters as the five adult hens, because the new chickens will outgrow the chicken tractor. How do I best do that? I am concerned about two things: 1, the fighting that might occur between the older hens and the new chickens, and 2, the fact that - because the chicken tractor is too small for five fully grown adolescent chickens - I will have to merge them BEFORE the new chickens begin to lay. How can I feed the new chicks and the older hens different foods if they are living in the same quarters? What is the earliest that the new chicks can eat layer pellets, or conversely, can the older hens eat some of the smaller chicken's food safely during that time they will live together?