Kitty likes to litter...and not in the box.

try changing the kitty litter. cats dont like pooping in dirty kitty litter. the pee is marking their territory. dont hit or scold the cat. another way to have the cat not litter on that same spot is to place her food bowl in the area. cats dont eat where they poop so this should work.

I have, and still am with my Waffles cat. She prefers to poo on my sunporch floor than use the litterbox, which is located conveniently nearby. I think she just wants to avoid stepping on peed-up newspapers in the litterbox. Another reason is that she doesn't like Columbus, my other cat. She's perfectly healthy, eats, plays and sleeps well. I don't understand why she feels that she must soil the floor. Even the Chlorox that I throw on the poo stain doesn't stop her --- she'll just do it close by. Yelling or hitting a cat for any reason is futile and cruel, so I've never done that to her. Okay, I swore at her, but that was about it. To be honest, I've been looking for an answer myself, although I will definitely ask my vet when I take the cat for a checkup in the near future.

let her stay outside and wait till she make poop. After that make her smell her poop on that place and she'll poop on that spot always.. try it