i personally like layne labs, that was formentioned in this post. its a few cents more than rodentpro, but of course the more you buy, the cheaper. but what i personally liked about this site is you can order as little as feeders, or as many as 1000+. good for us who dont have the vast collection some others who order online do. so i order about once/twice a year so far. also they have 2 day delivery when ordered monday -wed @ noon. when i got my package it was still frozen. no mice brick in my bags however, but very neatly arms tucked away prestine little mice. also, rodentpro is in my home state, and layne labs, delivering all the way from cali to my state of indiana, had a cheaper 2 day delivery than the 5-7 days at rodentpro only 2-3 hours away from me. i didnt order mon-wed noon, and still got my order in 4-5 days.