Actually mice and rats don't have control over their bladders, so they are always going.
Yea because they use it as a trail to follow back and forth when foraging. thats how they train them in movies to go to a point, have they walk it a bunch of times then they go it on their own.
I acctually just fed 2 rats to my guys and one had normal feces, and one's stank to high heaven. it was gross.
~mike
“The richest value of wilderness lie not in the days of Daniel Boone, nor even in the present but rather in the future.” - Aldo Leopold