There are fleas on dogs. It is nothing more than clean and hygienic. If you want to prevent fleas, you should pay attention to good dog health. Bathing, combing, and sunning are effective ways to prevent convulsions. Try not to go to weeds and wet places. In addition, it is also a good way to use the moth-proof collar. Don't underestimate this kind of collar. This collar contains killing ingredients. There are many small holes in the collar. The medicine leaks through the small hole. You can walk on the dog and encounter fleas. It can be used to expel or kill it, but it should be noted that some pet dogs may cause skin irritation after prolonged use.