Well my baby chicks are almost 2 weeks old, and we built a little pen for them to play on the grass. Just last night we finished the pen, and let the babies play on the grass for a good hour or so. They were so tuckered out that three out of the four were just laying in their brooder box once back in it. At first they seemed a little unsure of the grass under their feet, but they eventually got to pecking around. Today I got them out in the little pen again as I watch nearby. I've even got one who is stretching their wings to fly a little. They seem to be sticking near their water, but mostly ignoring their food they normally eat. Is this because they're getting enough food from the grass?