I’m a vet. Dog had eaten a whole roll of poop bags (the plastic baggies people use to clean up after their pets on walks). They unspooled in his gut and spread from stomach to colon. His owners realized what had happened when he started pooping out bags, and brought him in through ER.
My coworker went in to cut him, and the scene she described was hilarious: he would intermittently strain a little, and poop out a little section of bags. Someone would tear them off, and he’d be ok for a bit then poop out some more. Like he was dispensing them for himself! He did great after surgery.