We have peaches and plum trees down by our chicken coop. Our hens LOVE to pick at half eaten peach pits, they'll eat off the meat then leave the pit there. But today I was munching on some plums and without thinking tossed it at the chickens. Instead of picking at it one of our RIR hens swallowed the thing whole. I immediately realized that probably wasn't good, and went to grab the other two I tossed. I got the one, but our month old Barred Rock pullet gulped down the other one before I could grab it. They seem okay now but is a plum pit in their crops going to affect them? And if so, what can I do for them? Thanks so much!!