So far, it's been very small bits of platic that are showing up. This morning there are some much larger pieces - like 3/4" long and curved - I'm hoping this is the plastic with the loop end of the cup. Sherman also threw up some clear liquid this morning - he's never done that before. I would think that with 3 days of non-stop high fiber, (with plenty of results ), if he had a blockage, nothing would have gotten through. If he throws up again, I'll check with the vet.

Nobody needs to respond, I'm posting to make myself feel less worried. It's probably nothing.