Aww that poor baby. lol 
 
My Bentley ate floss once. Only once since I'm totally more careful now. And it was sticking out of his butt 

 I gently pulled and kept pulling, it didnt get caught on anything inside,, I was super careful not to hurt him. It finally all came out. Poor baby. My dog froze and was acting funny that's how I knew something was wrong. But when he just gets poop on him unless it's really bad he doesn't act funny. So I always check his butt after his daily walk as that's when he usually poops. He is potty pad trained though. But I feel like I'm always checking his butt for poopers. I will try canned pumpkin, hopefully he'll actually eat it. lol So picky!