Insect repellent once a month before 6 months old; After 6 months, 2-4 times a year. Dogs that have just been brought home need to be kept for 3-5 days after their physical condition is stable before the first deworming. Feeding some probiotics to children before taking insect repellent can strengthen the digestion of the stomach, and feeding more probiotics at ordinary times can improve the stomach. If it is deworming in vitro, puppies who live indoors for a long time can be deworming once every three months; Dogs that often go out should be repelled once a month. External anthelmintics need to be absorbed by the skin before they can take effect. You need to brush off your hair when using it, and be careful not to take a bath for two or three days after using it.