By-products are poor-quality ingredients.
It's a myth
By-products are sometimes thought to be low-quality ingredients that shouldn't be
included in pet foods.
By-products are an excellent source of protein and other nutrients.
- A by-product is any ingredient that is produced or left over when some other product
or ingredient is made.
- Broths and gelatin are examples of meat by-products in human foods.
- By-products in pet foods that meet Association of American Feed Control Officials
(AAFCO) guidelines come from clean animal parts other than meat, such as liver,
kidneys and other organs.1
- Purina purchases all by-products from USDA-inspected plants. They must meet stringent
criteria for nutrient content, production and quality assurance.
What they can be
What they can't be
By-products can be more nutritious than meat alone.
- Muscle meat is deficient in many nutrients, including calcium, other minerals and
vitamins. Many of these missing nutrients are abundant in meat by-products or poultry
- By-products are also an excellent source of protein and amino acids.
- For example, poultry by-product meal contains 60% to 70% protein and can be highly
By-products used in Purina© diets are high-quality ingredients that can boost the
nutritional value of a pet food.