When the Bichon Frize is still a puppy, it must be dewormed internally and externally for the first time starting at one month after birth, and then again one week before vaccination at 2-3 months, and wait until it reaches adulthood. That means deworming every 3 months to half a year. Generally speaking, external deworming is usually in the form of spray or drops. Just spray or drop it on the back of the dog's neck. It is best to wear a collar on the dog to avoid It wrongly licks away. There is also an insect repellent collar that can also be used for dogs, which is most suitable for summer when there are more mosquitoes.