I have to admit, I did not know about rats being ... well you can say heroes when it comes to find mines. Just a couple of months ago I read an article about it and just the other day I found this documentary on Netflix.
Obviously you can't be fearful of rodents. I know some people are (my mom for example) or just plain disgusted by them. The interesting thing here is that you get to know how they go about it, what their reward is for doing a good job and that one rat especially was the talk of the town even before it went on to become an essential work member and peace giver (in more than one sense).
I also know some people may have some issues and thoughts about the rats and them being maybe in danger - but since they are not weighing that much, they don't seem to be in any actual danger. So win/win, right? You still may have some thoughts about that ... but give this a shot and it may sway you.