There is something wrong with the food of your dog that has caused her such type of stools. The 5 month old puppy has very sensitive digestive system so you must take care of her diet and give her soft food that can be easily digested.
My 5 Month Old Puppy Has Green Very Soft Stools. What Is The Cause Of This?
Is the food green? If not, I would suggest a quick visit to the vet if this goes on for more than 3 days. Good luck.