Nutrient rich glands and organs are superb foods for dogs & cats. They are a vital part of a natural carnivore diet. This "physiological" strategy is based on the idea that when another human or animal consumes the gland or organ tissue concentrates, these healthy, intact components can supply his organs and glands with the building blocks they may need. PawHealer glandular concentrates are from Argentenian range-grazed animals. No fertilizer, hormones, antibiotics or feed supplements are used. We use no solvents.