We have a fenced in backyard with heavy bush growth all around and a chain link fence. It's a square and approximately 70x80 in size--that measurement is in feet. It's about 85% grass with some random plants/flowers. Is this enough size for 4-6 laying hens? I was thinking Rhode Island Reds because they are plentiful to get around here. We're in Nashville, Tn. Sorry if this is on wrong forum but it didn't seem to fit anywhere else. We're picking up a coop this afternoon and we'll be reading on how to take care of our chickens. Any quick tips/tricks is appreciated! Thanks!