We just do it the slow way.Set out the rats in some warm/hot water, turn on an episode or two of doctor who. Every time an episode is over we check for thawed-ness and refill the bucket with warm water if it had cooled. The tiny babies get their food quickly, the big guys have to wait til their bigger rats are done thawing. After the rat has thawed we usually let them sit in hot water a little longer to get them warm all the way through.
It takes a while but it's easy and no hassle for us.![]()