A cat peeing but not pooping in the litter box may be because the size of the litter box is inappropriate, the cat does not like the smell of the litter, or the cat has not developed good habits; first, the cat needs to be clean and comfortable For the cat litter box, choose unscented cat litter to avoid the cat not liking it after smelling it. Then wait for the cat to poop next time and put the poop into the cat litter box. If you repeat this a few times, the cat will poop in the cat litter box. Shit.