I have a question about adding some 7 week old rhode island red to the rest of my flock. I have 12 hens that are mostly 1yr but i have a few that are older. Then I have 2 roosters that are 1yr and the other is a few yrs old. Im not to worried about the hens, but i am the roosters! They are big guys...1 barrock and 1 golden sexlinx. So what are you thoughts? also my flock is free range during the day...how do i go about doing it when i but the 7week old in? will they just follow the rest of the chickens? do i leave them all lock in together for a few days?