I've recently started feeding Roscoe parsnips and I never noticed how hard they actually are. The pieces were the size of probably a little smaller that your pinky nail and square in shape. I noticed when watching him eat that it looked like he was chewing it but still basically swallowing it whole. My question is will it digest properly and break down or does it pose the risk of impaction. He's 10 and a half months old probably 17 or 18 inches long.