Why is my female cat not peeing in the litter box but will poop in it?

There could be several reasons why your female cat is not peeing in the litter box but will poop in it. It could be due to a medical issue such as a urinary tract infection or bladder stones, behavioral issues such as stress or anxiety, or the litter box may not be clean enough for her liking. It is important to consult with a veterinarian to rule out any medical issues and to address any behavioral concerns.