Cat Pee Outside of Litterbox

I have 2 cats. One is skinny with long hair. The other is the oldest, a short hair, and chubby. Both are healthy, up to date on shots, no issues, etc.


When cleaning out the boxes (we have 6) by either scooping them out or the bi-weekly clean, I notice pools of pee underneath the boxes. I have watched them from afar and neither seem to pee over the edge, on top, and so forth. They both seem to pee inside of the boxes with ample room. The litter is unscented, the boxes are in a private area for them, not around vents, etc. I have tried putting mats underneath, towels, placemats, everything I could think of. I've used enzyme cleaners, non citrus smell cleaners, etc. I have checked the boxes and there are not any cuts or tears on them, no leaks, nothing. I am at a lost.

Why is there pee underneath the boxes? What can I do to stop it? I have to replace a brand new wood floor because of this.

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May 23, 20190 found this helpful

This is so odd. Does it happen with all 6 boxes?

If it was just one, I would say there was a leak in the box that you can't see, but is slow. You could tell if you put a few drops of blue or red food coloring and water in the empty pan and let it sit on a paper towel outside you would see the dye stain on the towel after it sits for a while.


OR, the other thing it could be (we had this issue) where a pipe sprung a very slow "spray" leak and it was spraying water up on the wood floor so much that it soaked through the subfloor and into the upstairs floor--that was how we figured out we had a leak. it was a big fat wasn't dripping so much as being sprayed up in a slow steady leak.

If it is all of the boxes perhaps it is something that one of your cats is doing in the middle of the night when they are tired or can't see as well.

If you can get pee samples from both, I would have that checked out just to be safe...cats can often have very limited symptoms of urinary tract infections and may pee outside the box when this happens.

The cats I sit for, each litter box has a piece of plastic shower curtain type material underneath the box and on top of that a layer of newspapers that I would change every day or two.


That seemed to protect their floors (one is carpet, one is flooring of some kind). Perhaps you can do that when you get the floors repaired so that doesn't happen again.

Post back with an update.

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May 23, 20190 found this helpful

If you are putting towels underneath and there is still pee, they must be urinating outside the box. I would invest in a baby monitor to see what is going on.

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May 24, 20190 found this helpful

I have had this happen. As cats get older they have more trouble with sides of litter boxes being harder to step over. It can also be harder for them to get in the right position. I got a bigger box with lower sides and that did help. I also keep puppy pads under the box to protect the floor. We still have the occasional accident but it has helped a lot.

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