Truly "Nature" Chicken

I just read a little blurb over on SlashFood that makes me very happy. The British supermarket chain Sainsbury's is going to plant 1 million trees on its chicken farms to allow its organic hens to live in a more nature setting. Since chickens are descended from jungle fowl, this is a great way to return the chicken farm to a more nature environment. I would be willing to bet that a side effect of this is healthier, not just happier chickens. Healthier chickens will lay more eggs, meaning more output, meaning more money for Sainsbury's. Hopefully this will be an example following by food producers worldwide.