Run referenced is Cindy in PA's 375 square foot run. If you were to press me, then I will say one acre of woods will not provide more than a small percentage of what 7 adult hens in lay require during the summer. Would be pretty good for a bird or two. If doubts, I will invite you down to see what I am looking at.To be clear: are you saying that an acre of grassed and forested space will not impact the amount of supplied feed needed during the summer period for 7 birds?