I have female cat that gets in the box but goes over the side, not realizing her butt is hanging over the edge, puppy pads and weight loss(on a canned food, time dry food feeding diet) have helped.

Get a huge litterbox, and if you think he's having a medical problem like a urinary tract infection, he should see a Vet right away.

 

A larger litterbox, and one with high sides. Too high to allow the butt to stick out while peeing. Petsmart sells them or you can make your own from a storage box.

 

Gizmo occasionally does an 'up and over' move and sprays the wall. Yuck.

I discovered that she would stop doing this if I put more litter in her box. It is now about three inches deep.

maybe yours is too shallow and gets dirty faster. Also be sure to scoop it twice a day.

 

Thanks for all the replies and the helpful suggestions.

I have a few more questions.

Cat Daddy, could you tell me what 'puppy pad' is? How does it work? Can I buy it at the local pet store? My cat has been on a diet for a while now. He was as heavy as 21 lbs and is now around 19 lbs. I'll try to control how much he eat because he sleep all the time and don't need that much food.

coaster, I'm seriously considering getting a larger litterbox. My concern is that for over a year, my cat has no problem aiming his pee before. The litterbox hasn't changed in over a year. The problem seem to start pretty recently. Is it possible that he just decided after using the litterbox for over a year that he like a bigger one?

gizmocat, I put about 4" of litter in my box. Sometimes even deeper than 4". But my cat like to dig and some part of the litter may be shallower than 4" after digging. I'm definitely cleaning his litterbox more often now. But what I'm concerned about is that for over a year I've been cleaning the litterbox once a day on schedule without any problem. So I'm not sure if cleaning more often will fix the problem.

Today I actually caught him peeing outside the entrance to the litterbox. His whole body was inside the litterbox with his back facing the entrance to the litterbox. For some reason the pee shot backward and landed outside the litterbox on the mat.

 

Puppy pad is like a big flat diaper, absobent tissue on one side with a palstic layer on the other, should be available anywhere dof stuff is sold, I get mine at Walmart.

Also if you don't already, try a all canned food diet for him, lots of folks have had very good result with that, try searching the Health section for more on that, and you won't have to worry so much about how much he eats, they'll almost self regulate the diet and your getting better nutrition.

 

...My concern is that for over a year, my cat has no problem aiming his pee before. The litterbox hasn't changed in over a year. The problem seem to start pretty recently. ...

It's good to notice things like that. Any unexplained behavior changes could be the result of a health problem. This type of an elimination problem isn't usually associated with urinary tract diseases, but I think in light of what you've noticed, I'd recommend having it checked out at your vet.