Gee. Ben might fool you and go ahead an get an ulcer or worse despite your trust in his tough innnards.
Be very cautious!

I've had a lab eat soda pop cans from the garbage bag - no effect. Tennis ball fragments, a paper clip (observed on x-ray done for a ligament tear).

My EXCELLENT vet of almost 20 years has seen it all (has a bag of stuff retrieved from retrievers....).

My first golden retriever got ahold of one of my barbed fly fishing hooks and pushed it right through his gums between the teeth and then comes running up happily to me.
The emergency vets had to anethesize him to remove it $$$$.
My regular vet said he NEVER would be able to get something thru that amount of tissue if he tried. Dog did it, no problemo!

My 2nd golden retriever ate a washing cloth - no apparent effect and it was observed to be expelled from the nether region intact.
Very 'oral' he would take many things for a taste treat and we were working hard to dissuade him.

Then at a later point he ate a sock, a thread loosened from it and twisted his bowel, and the resection surgery killed him as his intestines became twisted, necrotic and then he was dead. A wonderful just passed one year old. Very sad.

If I got the health care from MY human doctor that my vets give my dogs, well that would be something. They give TIME, consideration, etc. Real good docs.

On a lighter side:
My vet says he asked one client to bring in a stool sample.
Client comes in with a bar stool for him.
Yuk.