Our pastel banana boi is an August 2017 hatchling. We took him home in October at 129 grams eating f/t small hopper mice. Since hitting 180 grams three weeks ago, he's been eating 30 gram f/t rat pups. His last weight before a shed and poop was 219 grams.
Originally, we (meaning my daughter) heated our mice with a hair dryer. When we switched to rats, we switched to warming in hot water. My own sense is that with larger prey, hot water offers a more uniform heat (also less smell). After 20-30 minutes under hot tap water our rats reach approximately 90 degrees. We then give them a minute or two under real hot water to bring them to 100 degrees and then we feed. We always use a heat gun to measure the temp of our prey before feeding.
So far so good.