I exclusivly buy F/T rodents. (Online and at shows) And I couldnt be happier.
If bought from a reputable breeder no one should ever have any problems. Rodents are packed in dry ice or ice packs, Are shipped overnight or 2 day air and are of course, cheap!
Ive used them all over the years, Mice on Ice, Cajun Mice, FrozenRodent, The Mouse Factory & currently The Big Cheese Rodent Factory. Other than price I cannot say I prefer any over the other.
My only beef is some of these breeders send rather dirty mice. last thing I need is urine and feces all voer my feeder mice.
-Kev