Developed by the late Dr. Hargett, D.V.M., M.D.,to help combat losses in pups during the first critical few days following whelping. Just place in food 4-5 days before bitch whelps and ten days thereafter. Contains five proven ingredients to aid the female in providing a clean, healthy quantity of milk. Sodium Acetate & Potassium Citrate as buffering agents that neutralize acidity. Calcium Gluconate for milk production. Lactose milk sugar for energy. And Thiamine Hydrochloride, a crystalline Vitamin B1 supplement which overcomes neuritis of pregnancy due to dietary deficiency.