I like www.themousefactory.com personally, I have heard www.cajunmice.com is good as well. I had a apparantly bad experience from rodentpro - my order of rats were stinky and covered in fecal matter. I was not impressed. It also took them much longer to ship than anyone else I have used. I think it went out 2 days after I ordered and took 2 days to arrive. TMF was same day ship, arrived next day.