Chicken bones are known for splintering. Keep an eye on him and watch for coughing up blood, blood in his stools, lethargy or any sign of discomfort. Those splinters can get lodged anywhere from his throat to his anus. If they puncture something, depending on where it is it could be life threatening.
They could pass with no problem though. You just need to keep a real close eye on him for any signs of a problem.
Sandy, Koke and Lelaska's Mom