I don't have the address on me but I will post it for you tommorrow. Do you think they add something extra in the rat feed. If you go to Scales N Tails or any where else nothing is comparable to the size and muscle mass of their snakes ( heck it could be just good genetics). I do know that they do feed a special rat chow made from Purina, heck I got on the boat and bought some for my holder tank, they do sell large bags for $6.