Biotin Forte Powder Use for itching, hair loss, dull coat, dandruff, pigment disorders and eczema. If biotin is fed during the coat change, this accelerates the change - the coat grows back healthy and with optimal pigmentation. This powder is particularly suitable for short-haired dogs. Administer Biotin Forte to your bitch daily from about three weeks before the litter until the puppies are weaned. Your bitch will have little or no hair after the puppies are weaned, but in almost all cases will still be in show condition.