I would suggest that you put "rendering plants usa" in a google search to read about animal by-products and what they are. It will open your eyes to this dirty little secret.
Everyone seems to be very passionate about what they feed their babies and this food debate never ends. Just educate yourself and feed whatever you think is best for your furbabies..They depend on us to give them the best food and will have to eat whatever we feed them...they don't have a choice really so it is our responsibility to provide their nutritionaly needs.
I still have free samples available to anyone who want to try the Life's Abundance All Natural Dog Food (no corn, no wheat or soy and no by-products of any kind). My girls LOVE it and they were the pickiest eaters out there!