Yep Kirby is a dog, but he's tiny and a runner, since we don't have a fence, a litter box inside was easier than standing outside or tying him up. This has made life easier in lot of ways, we have even gone on some short overnight trips and left him in the laundry room with food, water, and litter box. I have one for the boat and put it in our enclosed head. Our last yorkie used to have to go potty around 5 each morning, and what a hassle, I'd have to get up, get dressed, climb off the boat, down the dock and find some grass. Now I just pick Kirby up, place him in the box, shut the door, and in 9 out of 10 times he will leave a little something behind

It's funny, if he knows we are going to go on a walk, he will run to the littler box just before we go out and empty his bladder, similar to what I do:biggrinjester:
This morning was traumatic though, on our journey down the stairs I tripped and wound up falling down several steps on to the midway point landing, somehow I had enough time to get a better hold of him and cushion him, by the time he rolled out of my arms he was only a few inches off the ground. We both just sat there dazed for almost 5 min. Since he is so small and our stairs are wood he has taken a few tumbles so whenever possible I carry him, sometimes it's in the laundry basket, the waste basket, or my gym bag, but I try to give him a lift down