OK so i just fed my boa Old Greg and he ate fine got the mouse done fine and he is very active but as i got closer i noticed something and me and my friend who also owns snakes has no idea what this is...its about 4 inches from his head and its on the underside of him and it looks like a pebble is pokeing out and if you get real close you can see what looks like maybe blood through his skin...im trying to get pictures but its hard through enclosure and he just ate so i dont want to handle him...could it be a peice of poop that he squeezed out of the mouse on the way down his body or what.. he seems fine as far as his actions they are normal and this was not there before i fed him..PLease let me know of anything you can think of, and i will try to get some pictures up when i can