Yep, still here...just had to type up a response to you and it took longer than I thought.
Thanks for the additional information. No vomiting or blood is good as is the fact that she's otherwise acting like her normal, energetic self.
I was worried that she might be much younger than this and that parvo would have to be a possibility. But, if she's been vaccinated and she's perky, then it's less likely to be a concern.
There are, however, a number of different possible explanations for her loose stools which range from other viral/bacterial infections to inflammatory bowel disease to dietary indiscretion to internal parasites....to name just a few examples.
It's quite possible that symptomatic treatment as I'll outline below will be sufficient to correct the problem:
1. Feed a bland diet of 1 part boiled chicken (or hamburg) to 4 parts 20-minute white rice. Feed only a small amount of one time, 3-4 times through the day. I would not feed any regular dog food.
2. If she is not currently taking any aspirin or nsaid products (and I don't know why she would be) and is not vomiting, then you can give Regular Strength Pepto Bismol. The dose would be 1 ml per 10 lbs of body weight 2-3 times a day.
Pepto bismol should not be given to vomiting dogs since it contains salicylates (the active ingredient in Aspirin) which can irritate the stomach. It can also turn the stools a dark grey color.
3. I'd start her on a good quality, canine probiotic such as Forti Flora or Resources Protegrity GI. These products can be extremely useful for gastrointestinal issues (and to help strengthen the immune system as well). They may be available at local pet/grain stores or can be purchased online.
4. Hopefully, you'll start to see improvement soon and if that's the case (her stools are firm), then I'd slowly transition over to her regular food which should take about 7-10 days. In other words, feed 25% regular food/75% bland food for 3-4 days, then 50/50, then 75/25 and then 100% regular food.
If you don't transition the food slowly, some dogs will develop diarrhea because you switched foods too quickly.
If her stools don't start to firm up within a day or so, then a vet visit may be prudent. I hope this helps. Deb