Generally speaking, Bichon Frize female dogs can officially enter the adult stage after seven or eight months, or after one year old. Then they will have estrus two to three times a year, usually in spring and autumn, and they will shed seventeen times during the estrus. Blood around the sky. During the estrus period, the female dog's genitals will be swollen, have a distinct odor, and the genitals will bleed, and the dog will lick the genitals frequently.