I take them out of the freezer, put 5-6 in a zip lock storage bag. Seal the bag after taking out as much air as possible. I then fill a large pot up with water. Put the rats in the pot and turn the stove on low(electric stove). I keep an eye on the temperature. I remove the rats, once the water reaches 100 degrees. At that time it's feeding time for these. The next zip lock bag goes into the pot and the process starts over again.
It takes about 20 minutes to get the rats up to 100 degrees. The snakes seem to like a nice warm meal.
Jim Smith