I've been buying my frozens from rodentpro.com since 2008 and haven't had any problems. I was scared on my first order because it was the middle of summer in Florida but, much to my surprise, they arrived frozen solid. The only thing is I have to buy at least a good amount to make it worth it, the first $50 or so goes towards shipping. Just order enough to fill the box(but not go over or it'll increase shipping cost) and you'll get awesome prices. It's also nice cause they have "hot deals" on surplus all the time. Like right now.. You can buy 100 rat pinkies(24 cent each), 100 rat fuzzies(49 cent each) and 100 medium rats(1.24 each) all for $251 shipped!