Suddenly changing the main food of the dog will cause gastrointestinal discomfort and loose stools. When the taste of the dog food changes, if the dog does not like the taste of the new dog food, it will also cause the dog to become anorexic. Volume decreases. It is recommended that when breeders want to change the food for their pets, they should mix the old food with the new food for about half a week, and then replace all the food with the new food to avoid causing physical discomfort to the dog because there is no transition period.