You'll need 5 pounds of Dry Ice for ea 24 hours. So 2 day may seem cheaper, but with an insulated box and 10 more pounds it will only be pennies. UPS is a good shipper. As for live mice you'll have to send them Delta or any other same shipping service. It will cost about $175.00 to ship live mammals.
:live and frozen rodents....Our colonies are exploding and I have tons of extras that I would like to give away to some of my herping friends, but I wanted to check in with yunz(yep, I'm from Pittsburgh) to find out your experiences with shipping them...any reccommendations would be great...also will dry ice keep the rodents frozen for two day shipping?(much cheaper)