Nuked it?

You didn't microwave it did you? That is a very bad habit and you should break it at once. Since microwaves heat from the inside out, the mouse may only feel warm to you, but inside it could be hot enough to burn your snake internally, I don't even want to consider what that might mean!

I use an ordinary hair dryer. Once the mouse is fully thawed at room temp, I run a hair dryer on low over the mouse for 30 seconds or so, then hit just the head at real close range for about 10 seconds, then offer.

If she has only ever eaten one thing at a time, she may not take two. You might want to think about larger mice if you can find larger ones, or try her with same size rats and go bigger once she eats the rats.

Gale