
Hi
Have you taken your bitch to the vet for a checkup? Are you sure that all the afterbirths were expelled? When you say she is panting, is that just when she's feeding the pups? Sorry for so many questions, my first thought was that she
may have an infection. My breed doesn't have a great appetite for a few days after whelping - seem to wait until all their "bits" are back in the right place again. They usually have runny poos (or even full blown Dire Rear) for a few day, up to week after, depending how many of the placentas they have managed to swallow!
If you are at all worried, I'd get her seen by the vet. Good Luck