As a former distributor for PKC dog food, I have taken the same view to dog food claims as I have with other things. If it sounds too good to be true, it usually is. When a premiun quality food is being feed, a 75% reduction in food intake raises my eyebrows more than just a little. Then to find out that the super food isn't complete, and must be supplemented with veggies and oil, is another red flag for me. I would be interested in seeing the ingredients, protein and fat contents, digestable calories, and omegas and supliments added ect.
The life spand of dogs vary greatly, but generally dogs live 10-14 years, some live to 15-18 years. Purina did a single 14 year study and concluded that a dog fed Purina dog chow would live an average of 2 years longer. Two years longer than what group of dogs? Michael Vicks fighting dogs? Aunt Millies lap dogs? Give me a break! What would a second show? Two studies with the same types of dogs could reverse the results. There simply hasn't been much study done on the needs of dogs. If the food has to be supplimented, something is lacking in the product in the bag.