Climb in cat box

Maker Challenge entry
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About the Project: 
Got a kitten that likes to spread litter all over the place. Also a dog that likes to dig in it as well. So I decided to make a climb in cat box. Litter stays in and the dog stays out. There is a barn door and wheels underneath to make it easy to move. A little scrap wood and a few tools and no more mess in my house.!