The method of replacing new dog food for Bichon Frize puppies is as follows: 1. Add a quarter of the new dog food to the dog food used by Bichon Frize puppies before, and then check the dog's defecation to see if there is diarrhea or soft stool. If there is any condition, probiotics can be fed for conditioning. 2. After adding new dog food for one week, increase the amount of new dog food to two-quarters, and then increase it again every other week until all is replaced with new dog food. Can.