What happens when a dog eats dog food and has soft stools?

The dog eats dog food and has soft stools because the dog has changed the food too quickly. The owner does not change the dog’s food step by step according to scientific proportions. Directly and roughly changing the food to new food can easily cause gastrointestinal discomfort and soft stool in dogs. It is recommended that the owner add 10% new food every day and slowly transition from the old food to the new food so that the dog's stomach can slowly adapt.