There are many possibilities that could cause this but here are two of the multiple factors that might warrant consideration. The first is that changing a dog's diet over too short a time-frame can cause soft stools. As far as what's "too short" my rule of thumb is to gradually replace 1/4 of the old diet with the new over a period of 4 weeks. That will give the dog's gut a chance to adjust to the new diet. If you've made 3 changes in less that 3 months, then the rate of change rather than the food itself could be contributing to the problem. If she's allergic to something in the food, it can take up to 6 weeks on a new diet for that substance to clear her system. Also, if a her age is a guestimate, it's possible that she might be older. In that case, an adult diet with a lower protein level might be easier for her to digest.
Second, dogs who are stressed may have more active guts. The more active the gut, the faster any food moves through it and the less time for any water to be absorbed from it. The results of this are soft stool. To avoid this, provide your dog with a private place to eat and feed her when she's relaxed. If you normally feed her after you arrive home, replace in any high-energy greetings that could gut her gut churning with a calm one that will enhance her ability to digest her food.
Read Dr. Myra Milani's response. Also, determine if your dog is ill. If so, see a vet.
If you determine the problem is not serious, add canned unsweetened pumpkin or baked yam to your dog's diet in moderate amounts for a few days. The high fiber can work wonders. It also works on constipation.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.