(International K9 Semen Bank) CF-Plus is a nutritional supplement formulated to improve canine sperm production, concentration, and quality. It may also help regulate the female's season. 300 mg perna mussel, 100 mg brewer's yeast, and 100 mg alfalfa per tablet. Feed 1 tablet per 15 lbs. body weight, dividing the dose between morning and evening. Chewable tablets.