Here's the scenario . We have two older chickens that are about 4 years old. (1 buff and 1 barred rock). I am wondering if I would be fine introducing my 4 new chickens that are almost 5 months old . ( 2 Barred rock, 2 Rhode Island reds). I have heard some say they need to be the same size as the other chickens in the flock you are introducing them to . My 4 are nice size now but not as big as the older ones . I was thinking since they will have the older ones out numbered they would not have a problem . Starting to get eggs from the 5 month olds so would like to get them introduced if possible . What do yall think?