Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5437832.
I tried running this through my printer with lowest resolution and had problems 3 times, but I think that was due to my printer not being leveled.
After leveling it I got a little bit better of a print but still messy in some areas, I am very new to 3d printing so not sure how I could make this much better with the settings but I think my mouse will still love it how it is.
If your little animal likes to chew on things a ton I would suggest PETG or PLA without any toxins added like colors or dyes to make sure your little guy stays safe. My mouse does not chew on it.
As you can see in the pictures I added a carpet on the 2nd floor for my mouse to have some more comfort, you can replicate it super easily. I cut a new sock in half and then cut it to a square and glued the outside less soft part of the sock down onto the floor.