Well that means something has moved through there. Our dog did poop once before surgery, and even twice after surgery, when she hadn't eaten in days. So food can stay in there a while.

I'm with applesmom ... call your vet's after hours number, or an emergency clinic. They'll be able to talk you through what is going on at this minute, and what actions you need to take if any.

Good luck, I'm still thinking of you both. I hope everything turns out okay.