We have one cat who uses the box, but she is what we call a “percher”!  She positions herself very adeptly on the side of the box, with her bum hanging over the inside edge and proceeds to do her business…and then she leaves! She apparently does not believe in burying the business either!  I was very interested to see if she would actually go into the box and maybe even start to bury her business when we used the LitterGetter