I have a small flock of five chickens in a coop with an enclosed run. I've read here about people keeping their chickens in the coop most of the day and only letting them out when they can be out with them. Is this okay for the chickens? It's attractive to me because my husband and I work outside of the house and live in a subdivision that doesn't look kindly on chickens. I'd like to be able to let them out when we get home from work, until nightfall, which in the summer would be about four hours. Is that enough outside time? I know they stay inside when its frigid outside, but what about year round? Thanks for your help.