Dog eats chicken bone ?!!?!?!?

I was watching a boxing event and left my food on the table. My dog climbed onto the chair and took it. Though I didn't realize it till hours after. It wasn't chicken wings, but the KFC type drumstick chicken bone. He's around 10 - 15 pounds, but got a hell of a bite.Tried looking all over the house for the bone but ending with nothing. Just wondering what I can do, what to watch for ?