I would stop doing that. That hot of water is probably cooking the rats. Warm tap water is much safer, just drain and refill the water a couple of times and itll thaw out fine.
Internal temps of the rats are never higher then 39f so I can't see it being cooked
How long to you thaw in cup of hot water ??
The water coming from my hotwater tank is 160 ish
1.0 Normal (Diablo)
1.0 Platinum Lesser (Aurora)
1.0 Russian Blue Cat (Magnum)
0.1 House Cat (Porsche)
1.0 Australian Cattle Dog (Diesel)
0.1 Yorky (Mercedes)
2.0 Kids (Matt & Leland)
0.1 Wife (Jennifer)
No The wife and Kids do not conform to the Automotive type Names haha