The most convenient and quickest way is to bathe the dog. Use a comb to comb the dog's hair while the hair is wet. Comb along the knotted areas of the Bichon Frize's hair, and then comb it horizontally with a small amount of force. After the knotted areas are loosened and combed, it is best to blow dry the dog's hair. Bichons and poodles need to have their hair trimmed regularly, otherwise it will easily become tangled and tangled.