[quote=Ragdog]Science Diet, like alot of commercial foods. Contain By-products and grain. The grain is used to keep the meat parts together. All this during the manufacturing process is heated at high tempeture. Which destroys most of the nutrients. [/quote] That my point: There's a big difference between surviving on a diet and thriving on a diet. Commom sence tells you that all living things were designed to eat natural unprocessed foods.