[The Fifth Man]

He might've just been curious. Most rodents that get rabies
are woodchucks and I think groundhogs, generally not mice.
And in the US it's really rare anyway for rodents carrying rabies.

You might wanna find out if animals in your neighborhood have
ever been reported with rabies. If it's relatively common, you
might wanna take the little bugger out just in case.

More or less, probably nothing to worry about.
That's about all I could tell you.