I finally made the decision that 9 out of the 13 chickens are old enough to free range. I figured them to be about 10 weeks old, the others are a bit younger so they are still separated. My plan was to let them free range only when we are home, but by the end of the week I let them free range from early morning till they went in the coop at dusk. I could sit outside and watch them for hours. The rooster is great, he keeps a watchful eye out for the girls and herds them in when the hawks are flying low. They were following me around when I was mowing the grass the other day. The rooster is friendly with the kids and the cat, they don't get too close to our dog though. Our little yard roamer kitty, Maggie, goes in the coop and inspects it, with the chickens in it or not. The darn cat even lays on the ramp to the coop and the chicks have to climb over her.