In this lesson, I break down Rule # Two of How to Feed Your Cat into three components, and explain how each component comes together to create this rule, outlining the importance of each one as I go. This includes the reason why you should only used identified animal sources in your cat's diet, why you should ensure the protein is coming from those animals and not plant-based protein boosters, and why it's highly unlikely you are going to "overdo" the amount of protein in your cat's diet.