As a petfood industry veteran of 40+ years, I agree with all of the points made regarding the need for food fraud mitigation systems for petfood. It is all about trust, protecting our pets and your business.
If you are in any doubt Google melamine in petfood.
Economically motivated adulteration of wheat gluten (and rice gluten) in 2007 - 2008 resulted in the biggest recall in the history of the petfood industry. I have attached an article I wrote in 2017 that gives a brief resume of the melamine crisis and the need for an approach that is wider than only HACCP to keep our pets safe.
Please contact me if you would like to discuss food fraud in petfood and its mitigation in further detail.