Mine are in our spare bath tub. I have three that are now 5 weeks old. At first I used newspaper to line the tub with paper towels on top to make it non-slip and would just roll up the paper towels and switch it out. Now I am using puppy training pads and it is so much easier. They can't tear it up like the paper towels. I can scoop off poop a few times during the day with a plastic spoon (yes, I do this) and change them out morning and late afternoon. They are now spending a good part of the day outside, weather permitting. Reno weather is weird. They say, if you don't like the weather, wait 15 minutes!