Hi, I just brought home new birds a week ago. All around 4-8 months old (2 are laying already). I have them in a coop/run that is about 12ft x 9ft, but I would like to let them free range in the yard when I'm out working in the garden. I have about a 5ft fence around the yard. A: Will they fly away B: If they do, will the return? C: Will they go back into their house from the yard at sundown? D: Is it ok to just let them poop all over the garden? So many questions. I am a first time chicken owner! So nervous and confused!