Just a precaution, I put a whole pumpkin in the range and let the chickens go at it. A few days later one of my golden laced wyandottes had an impacted crop. I preformed surgery and, as you might have guessed, it was a pumpkin seed causing the problems. It was only one out of about 80 chickens to have problems, and I have been giving them pumpkins since the summer so it seems like slim odds but it may happen.