Hello; I tried to look at the pictures but facebook does not allow me to look at more than two because I could not log in. After looking at two in closeup they wanted me to log in in order to continue. I do not have a facebook account, i guess this is the reason. I got a brief look at one of the composit pictures. I was looking for a skull but did not spot one. Owls often swallow their meals whole. The large prortion of the ones my classes dissceted had rodent bones. There was a leg bone visible in the photo that seemed large, perhaps a young rabbit? Perhaps a bird? I was not really able to tell. The larger the owl, the larger the prey they can catch and eat.