What happens if chicks eat grown up layer feed? My chicks are 6 weeks old and still hanging out with Mama Hen. I've had two feeders on the go: one inside the coop with the chicks containing Chick Start and Grow; one outside in the run, where the babies couldn't get, containing Layena (the layer feed) for our 19 laying hens. Now the chicks are able to fly up to the window and out to the run where I have the other feeder, what's a good way to feed adult hens the grit they need to make egg shells, whilst not- I presume- making my chicks ill by letting them get to the laying hen feed? Thanks all!!!