All my experience with chickens were chicks raised by their momma's. When ever my parents got new chickens they just turned them loose in the yard. My chicks are 5 wk (= or - a few days) and have been in the coop for two weeks. They lived in the garage for 3 wks because they weren't supposed to come until June but They arrived 3 days after i ordered them and I wasn't ready for them. I have 5 acres fenced. When can I turn them loose in the yard with a reasonable expectation that they will return to their coop at night. They are dying to get out of the coop right now. LOL