Reminds me of a black lab we had when I was a kid. It quit eating and got skinny. The vet had to do surgery for a stomach obstruction. The vet said you won’t believe this but we found an whole mop head in the stomach. I’m talking the big yarn type, not the little square sponge type.
Reminds me of our dog that we have right now. He had been acting sickly for several days. He wouldn’t eat. My daughter took him for a run in the desert. He stopped, obviously needing to do some business. He went near a cactus and seemed to be rubbing his rear on the cactus. She went over to him and took a closer look. He had a long string/rope/something-like thing about a foot long hanging from his rear. She started looking around for some sticks or something to use to pull the whatever-it-was from the dog’s rear. Anywho, she found some sticks and pulled the ick out. It was a pair of tights belonging to one of our other girls. LOL Daughter did not bring them home to be washed. And puppy-dog felt much better afterward and resumed eating once again. Dogs eat the darnedest things.