Not outdoors but in my garage. Certainly can be dangerous, little buggers can cause shorts in electrical wires, urine and faeces from rodents can cause health issues (especially in babies), and if the chickens see mice or rats they won't lay eggs. Not to mention if they take up residence and settle in...
A week ago my wife said she thought she saw a mouse in the garage so I got an electronic deterrent, but apparently too small for the garage. Because last night she saw it for sure. So I looked under the washer and a shelving unit and saw some sign.
So...in 5 minutes I made a trap with a bucket, tig rod, empty water bottle, and a grading stake for a ramp to the bait. Placed trap at 11. Checked at 630 and found results!
I tried to encourage it to find residence elsewhere but it insisted on setting up shop in my shop. So off with its head!