Hare Today--Good place for ordering raw foods
Rodent Pro--Another good place for ordering whole raw foods
Green Tripe--Supplies ground raw tripe, different organs, calf heads...
Bones2Go--If you live in Houston, it's a store dedicated to raw feeders. It has some fun stuff--aimed more towards the Barf model with all the supplements and whatnot, but she carries neat stuff like lamb, kangaroo, quail, emu, duck, goat heads...
Dogwise
SitStay
Flying Dog Press--Suzanne Clothier's articles on dog training
AKC
Dog Breed Info
Dog Owner's Guide
Petfinder
Senior Dog Project