I did call the vet. He said that judging by his size, an 80 lb Lab, I probably don't have much to worry about. He told me to keep feeding him, particularly high fiber foods, like bread or even pumpkin-pie filling, to produce a lot of..."output" and hopefully he will pass it.
If the vet told you to feed pumpkin pie filling to your dog he was wrong. You feed straight pure pumpkin, no spices or anything else in it. I'm surprised that he did'nt indicate that if the plastic doesn't pass, to take him for an X-ray. Good luck with him.
Those things are designed to soak up liquid, are they not? So, the longer that's in your dogs system the more liquid it's going to soak up causing it to expand in size. The bigger it gets, the harder it will be to pass. Now only that, don't they contain those silicon gel things inside them? If it tears, that could be a whole other thing entirely. I would say a new vet is in order, and asap.. like.. NOW. If it was my dog, I would be on the way to the vet.
I agree with Halo'sfire, because the first thing I would have done is feed the dog a good dose of peroxide, by the spoonfull, until the dog vomited up the plastic. By telling the OP to feed her pumpkin pie filling and lots of fiber, I would also wonder about the vet.I would grab the nearest same piece of plastic, and measure exactly how much liquid that item could hold.The problem now is, it's probably too late to induce vomiting. I would go back to another vet ASAP, and find the damn thing before it causes a blockage, breaks open, or both. Good luck.