My favorite site for dog items is the Bichon Information Station. Even though it is a bichon site, the info and essays apply to ALL dogs.

http://www.bichonfriseusa.com/index....ational%20mark

I like the Food Comparison charts on:
http://www.doberdogs.com/

As I use this food for both the cats and the dogs, I often refer back to it:
http://www.chickensoupforthepetlover...r_dog_formula/