I do not buy food or litter that way. They tend to be heavy items, and I figure the shipping costs would be prohibitive!

I do buy lots of stuff from petedge.com!

I have found Drs. Foster & Smith a bit pricey, not sure if I ever bought from them or not. I do enjoy looking and drooling at their items!

Also, I like That Pet Place, http://www.thatpetplace.com/pet/index.web

and Jeffers: http://www.jefferspet.com/

Remember, I am buying for dogs, cats, and fish, so I am all over the place! Brushes and combs, shampoos and conditioners, toys and clothes. I do buy fish food but that is a small package, hardly any weight to it at all.