Protein is a key nutrient for dogs and cats and a source of amino acids, the 'building blocks' used to build new proteins in the body. Irrespective of the pet’s age, protein plays many important roles in the body.

Food allergies are not common in dogs and cats, but pet owners often believe that a pet’s skin or intestinal symptoms are allergic reactions to specific food ingredients.

Protein is an essential nutrient that can be provided by both plant and animal sources. Are there differences between plant and animal proteins and what is considered a good quality protein?

Vitamins are important nutrients for pets and people. What are their functions, and should pets be given vitamin supplements?

The Purina Fecal Scoring Chart is a practical, easy-to-use tool that can help clients describe their pets’ stools.

Identifying which part of the gastrointestinal (GI) tract is involved is a first step in diagnosing GI problems.

A practical, easy-to-use chart that helps localize diarrhea to the small or large intestine.

Dietary antioxidants support pet health and help preserve the nutritional quality of pet food. Learn more about the important ways that antioxidants contribute to better, longer lives for pets.

Dietary carbohydrates in pet food help meet the pet’s physiological need for glucose. However, due to the ancestral origins of dogs and cats, some owners may question whether carbohydrates should be a part of their pets’ diet.