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It sounds like there is an irritation of the guts going on here which has led to symptoms of colitis, and the hot dog would be a candidate! When the lining of the large intestine is inflamed or irritated, it can cause this very watery diarrhoea and an overproduction of this mucus too.
The fact that she is not vomiting is a very good sign - if there had been a flare up of the pancreatitis then i is likely that she would be vomiting by now - look out for it. My advice would be that if she is bright and alert and drinking ok then do not offer any food at all for 24 hours, and allow her to drink little and often. If all is well then introduce something bland and low fat, such as chicken or fish, and feed in tiny meals over the next few days to allow her guts to just work on a little bit of food at a time. Once she appear to be back to normal, phase in her normal food very gradually over a week or so.
If she does start to vomit, appears to feel very poorly or there is no improvement, then pop her to your vets in case she needs some medication to help her through.
Best of luck,
I understand your worries over the parvo thing completely. I feel that it is unlikely that she has contracted parvo after all the precautions that you have taken, and the signs she is showing are not typical of it. Parvo dogs tend to have very bloody and dark diarrhoea without the mucus, feel more poorly and develop vomitting quickly too. If she goes downhill or things don't improve then you could ask your vet to test for parvo but try not to panic at this stage.
At 13 months a small dog such as yours should be mature - even if she is small. Starving very young dogs is a problem but adult dogs is fine - little dogs are just small big dogs! She will be fine without food for just 24 hours as long as she is drinking ok, and better off with her guts resting than more food generating more diarrhoea.