Buddy has just nicked a cooked chicken leg bone from out of the bin and eaten it :(

. He crunched it good and proper - I managed to get part of it from down his throat - bit my thumb in the process :( he regurgitated the rest up momentarily but wouldn't let me get it out - he swallowed it again. I'm now really worried he's going to get hurt from it.
Is there anything I can do - or do I just have to sit it out and hope for the best? I've restricted him to the kitchen right now - but is that a waste of time? I am so cross with him. I don't know how he got it out of the bin as it's a brabantia with a really tight fitting lid - he's never got it off before . Any ideas please - oh and to stop a thumb throbbing :( :( :(
Pam n the boys - one in disgrace