Yes, I went through the same thing with my puppy. She was older (6 months) and had just been spayed. Bella acted totally normal--eating, playing, running around--even though she wasn't supposed to be from spaying. She seemed to actually be constipated after the spaying, which concerned me first. Then, when she finally started going her stools became loose. I thought maybe it was something related to being spayed, like her system was just off. But then, for some reason, I decided to call the vet just to check. They said it might just be the pain meds they had given her, but to be safe I should bring some of her stool in. Well, I'm sure glad I did, b/c she had giardia (a type of parasite). It was easily treated w/ antibiotics. She had actually gotten it from my parents' dog. It was tough, since we couldn't bathe her for 2 weeks after the spaying, we had to wet her down with wet paper towels. I just wanted to give her a good bath to get rid of all those germs!
Good luck with your little one. It's better to get her checked out, just to be safe. And with our vet, there was no appointment necessary. We just brought in the stool, and then they called us to pick up some meds.
