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Illustration of two mammals, a brown elk with large antlers to the left of a black cow.

Mammals

Mammals are warm-blooded vertebrates distinguished by having hair or fur and nursing their young with milk produced by mammary glands. In the context of canine diets, mammals are a natural prey source for wild canines, providing highly bioavailable proteins, fats, and essential nutrients that support a dog’s biological needs.
Last Reviewed Date: 01/02/2026

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CowCow Cow is a primary protein source in many dog foods, providing high-quality amino acids, iron, and B vitamins. Beef-based diets can be nutritious but are also a common allergen for some dogs.

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