I let my 2 month old babies out to free range today with my older chickens . I'm not worried about them running off. I have a fenced in yard but it still makes me nervous. Predators are not an issue. Besides they are running with a roo and 4 guineas and they are all used to sharing the run together. And I put my little babies in the run along with two ducklings. I'm gonna be a nervous wreck before the day is over.