I am new to raising chickens, and I am using an old camper as a coop. I have a 50 x 50 area around the camper fenced in with chicken wire, and let them roam the whole back yard sometimes. I have scratch grains and cracked corn spread all around the 50 x 50 area they live in. Do I need to feed them chicken feed very often, or should I let them forage they yard and their area more than they eat feed? I have been feeding them about a pound of feed every morning and every afternoon. BTW, I have 8 chickens that are roughly 11 weeks old.