I've been thawing out my rats by just leaving them out in a bag for a few hours, but I'd like to switch to leaving them in hot water as my BP has trouble aiming and the heat should help (taking a hairdryer to one for a moment has worked before, but is a bit of hassle). Problem is I'm autistic and have a lot of trouble with "just leave it till it looks right" and vague measurements- so how long would I leave each size rat, and how hot should the water be? He's on rat fluffs for now, but is going to be moved to pups really soon.