Chickens were free ranging and came across silicon from when my DBF resealed the windows in the fall. I thought at first they found an eathworm. Then i realized what it was chased them through the yard but before I could catch the one she ate the silicon. a 3 inch long piece gone in seconds. What are the chances that she'll pass it or should I be watching out for impacted crop? I don't know how many of my 6 chooks ate the silicon or how much they ate just caught the one. It amazes me the stuff they find to eat.