would you feed this to your snake?

[stkkts]

So yesterday I defrosted 2 rats to give to my ball python. I let them defrost overnight in the fridge. Then I soaked them in warm water to warm them up. My snake took one, but refused the other. So I put it back in the freezer. My GF is saying that the rat is now infested with bacteria that started to breed while it was warm (It was only about a half hours time) and that freezing it wont kill the bacteria. I know most people wont do this with food we have to eat (But not too many people refuse food) but is it OK for the snake? Or do you think too much bacteria grew and I should just throw it out?