[pitlove]

Hi Jason-

Flip your bag of dog food over and look for the AAFCO statement of nutritional adequacy. If it says it is a complete and balanced food, there is no need to supplement your dogs diet. Supplementation could actually be counter productive if he is already eating a complete and balanced food.

Petdiets.com would be the best place for you to get information about pet nutrition as the site is run by board certified vet nutritionists.