How important is it for chickens to roam? Well if they have eaten all their grass in their penned in area, then they have to get outside and roam and eat grass and lots of bugs. This is great for the eggs. The yolk becomes a much darker yellow. The only problem with them roaming is they love anything green and you know what that means? They eat every green leaf they see. There goes my gardens. Oh and they just scratch away. So my chickens mostly roam in the fall and winter and early spring. Then during the summer months they get all the weeds I pick, vegetable garden scraps and their grain. They hang out in their penned in area which is very big. In another week I’m going to plant some grass seeds in their penned in area, but I’ll have to run an electric fence to stop them from eating the seeds. When the grass is mature, in goes the chickens and in one day or so there goes the grass. On to planting another section. Oh well, that’s what happens with 70 chickens.