Check for the AAFCO statement and buy a food made for your dog. If it’s a puppy, get puppy food and if it’s a big dog that exercises a lot go for a higher calorie count. You should also follow the feed directions on the bag.

http://minnesota.cbslocal.com/2012/02/06/mans-best-friend-what-you-might-not-know-about-its-food/