My grandson & I have 3 chickens we got last year this time so they are about a year old. We just got 4 more baby chicks which we will want to introduce to the older ones in about a month. What is the best way to do this and can it be done successfully? I have been told the older chickens may peck them to death. Any truth to this? We have a chicken house but mostly free range them in our back yard. Our old chickens are very friendly and share the back yard with our Boxer dog with no problems.