When we had both our cats, each one of them would pee in any of our sinks so we could see the blood in their urine. Never, ever at any other time, only when they had UTI problems. And we had one cat 18 years and the other almost 21 years.

I was humane soc. manager for 12 years -most all cats like that were a behavior (jealousy) type problem.

I would think that a fairer statement would be "most cats like that ended up at the humane society were a behavior problem"

I really think most cats with litter box issues are doing so because of a physical problem. Most owners would take care of it and the cat would never end up at a shelter because the problem would stop. I am assuming you are basing your opinion on cats that showed up at the facility you managed as I am basing my opinion on 40+ years of consistent cat ownership and association with other cat owners who have seen this happen. It was almost always because of a UTI or other physical problem.

Another thing that causes the behavior to turn up spontaniously is declawing. I hope the cat was not declawed during the spay procedure. This could defintely cause it. It hurts their mutilated paws to dig in the litter so they associate the litter box with the pain and eliminate somewhere where it does not hurt them to dig.

I would go to the vet to rule out a bladder infection or some other kind of infection. Even if you do think its behavioral always good to rule that out.

And like has been said before make sure your litter boxes are always clean. There is a product called Feliway that is supposed to be calming (gives off calming pheromones) which might help if she's upset about loosing the kittens but at 8weeks old the mothers shouldn't be that upset because that is the age kittens become independent anyway. Good luck!

I agree with everyone that a physical problem is probably the cause. However, I know from experience ....yes, you Rudy!.... that jealousy can also cause it. Whenever I've paid too much attention to one of my other kitties and grouched at Rudy's rough housing, as his "person," Rudy let's me know he's mad by (1) not giving me kisses when asked, and (2) peeing on any of my boyfriend's clothes that are on the floor. Hence, Bob's nickname for him ... Rudely!

We had a male cat few years old, he is the one in my avatar, had to take in the vet this past summer because he stopped using litter box, vet said he did not have anything wrong, no infection or anything, the best that we could figure out is something spooked him where the liter box is, we have another cat and she uses that liter box fine but our male cat just quit, had to get another liter box just for him to use :( Cats are just weird sometimes.

So my question would be, have you moved the liter box from where it was? Is there anything where the current liter box is that could scare her? I would move the liter box to the room where she is going to the bathroom at, till i could figure it all out...it kinda sounds like a emotional problem. But it would not hurt to take it to the vet just to rule out anything physical, an infection would certainly make her do that.

Thanks for all the responses. I have called the vet and scheduled an appt. They agree with some of you and think it could be an infection.