There is a wide variety of materials that can comprise the mixture that is processed at the rendering plants. The rendered material will be added to dog food either as "meal" or as "animal fat". The following list includes some (not all) of the ingredients that may be rendered as pet food:
- Tissue from slaughterhouses, including blood, feathers, heads, feet, bones, and entrails
- Restaurant grease and butcher shop trimmings
- Road kill animals, including pets, deer, raccoons, snakes, opossums, foxes, etc.
- Euthanized animals from zoos, vet clinics, or animal shelters, including cats and dogs
- Diseased animals, including those with Chronic Wasting Disease or "Mad Cow Disease"
- Tumor-ridden, cancerous, or "wormy" tissues
- Animal tissues containing drugs or pesticides and injection sites
- Flea collars, ear tags, Styrofoam, and meat wrappers
Read full article: Understanding Dog Food: What is Rendering?
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