Help!

Tell your family that the cat is retarded. That is why she can't poop in the litter box.

Cat sassafras tea

JayR 

This can be a complex issue, and trust me, I've dealt with the same problem many of time (I rescue and rehabilitate cats) First, what kind of litterbox are you using? What kind of litter? How often do you scoop?  Cats sence of smell is about 10,000 times better than ours, if the box is not clean, think~ would you go to a gas station toilet that has not been cleaned in weeks?  Most litterboxes from petshops and Wal-mart are too small, do not use the one's with hoods, it just traps the foul air. Do not use litter that has fragrances~ those are for our noses, not theirs,  Your kitty is showing displeasure of her box or location. Go to Wal-mart and buy a simple plastic storage box with high sides (prevents the litter from being kicked everywhere) measure the space before you go. Use simple clumping litter, I use only BETTER WAY litter it's more expensive, but I do not have to change it more than once a month, as long as you scoop well!  Other trick in keeping the litter clean is scooping it with a sturdy kitchen collander, you will get every drop!  Cat's are very very clean, so the most common explanation is that your kitty cannot stand her 'bathroom' and is protesting!  If she still continues her behavior, if possible change the location of the box, and give kitty some privacy. Please ask more if you need, I love to help cat people.

Hi, I agree with Trufin - your cat is trying to get your attention about something she is unhappy with.  It can be, as Trufin has said, that she dislikes either the type of litter or the cleanliness of it.  Some cats are super picky, some could care less.  I have tried switching from clumping litter to pine or newspaper litters in the past, and this is the response I get - a big "thumbs down".  It could be also your cat is shy or nervous - too open of an area or too much traffic walking by.  If you have more than one cat, they may not want to share.  More than one box may help, and make sure there is at least 2 inches deep of litter in the box.  

However,  if your kitty has been going in the box with no problems until recently and nothing about the litter has changed, you may want to consider a vet check.  Since she is a girl, cystitis is less of a possibility but can still happen (crystals in the urine).  Some females can get urinary tract infections also.  Some cats associate the burning sensation with the litter box - she is trying something else in an effort to relieve the discomfort, and to signal you that there is a problem.

A simple urine test at the vet may solve your problem.

Hope that helps!