Thank you for your response.. Inpt hospitalization would have been optimal however due to financial concerns and the fact I'm a nurse, the doctor felt comfortable with tx at home .. The pup is doing ok now however she now has a wound that required tx this am at the vet. Thanks again !!
This answer is coming a little late to you, my apologies.
I cannot explain this strange behavior without seeing it but I do urge you to seek your vets advie asap. Parvovirus is a serious disease and even dog's that are responding well can all of a sudden take a turn for the worse. I rarely treat PV with SQ fluids and instead are more aggressive and hospitalize the puppy and maintain thier hydraton with intravenous fluids.