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The original was posted on /r/tifu by /u/Super-Bnora on 2025-12-05 02:55:12+00:00.
So, like many FUs, this is one that I discovered today but has been brewing for a while.
I (48F) have an old chihuahua mix (19M). Back in September, the Cat Distribution System unexpectedly deposited a kitten into our lives. It‘s been a bit of a disruption, but overall she been a nice addition to our lives.
As all the kitten books advised, I kept her and the dog separate for the first few months, with only supervised visits and sniffs on opposite sides of closed doors.
When I finally did let them occupy the same space, I was surprised that the dog mostly ignored the kitten. Given the opportunity to enter the cat‘s room, he would trot right past her cute, eager face and investigate the litter box. I kept it clean, so he never got access to the kitten plops he craved, but hope springs eternal, and he checked back regularly.
Then one morning, as I was feeding the kitten, I heard the sound of pee on litter behind me. Sure enough, there was the dog, nose buried in the litter box, having a pee.
I wasn’t thrilled, but it seemed fairly harmless. I scooped out the massive clumps of wet litter, walked the dog as usual, and went about my business with the smug reflection that my old dog, at least, could learn new tricks.
Over the next few weeks, I noticed that the dog was still using the litter box sometimes. I didn’t encourage it — theres a lot of pee in that dog, and it definitely went through litter more quickly than a tiny kitten alone. And the room definitely smelled more than it had when it was just the kitten. No matter how often I scooped.
Then tonight, I noticed a puddle on the litter mat underneath the box. Dog must’ve missed, I figured. No big deal. And then, I fucked up. After moving the litter box over onto a pee pad, I picked up the litter mat. And dog pee came pouring out of it. It was soaked. Pee went everywhere. Pee on my clothes. Pee on the floor. Old pee. New pee. So much pee.
So, I kick both dog and kitten out of the room, and I cleaned. Threw out the mat. Scrubbed and swept and mopped the floor. Sprayed enzyme cleaner everywhere. Covered the room in pee pads. We will never be clean again.
TL;DR: Dog is coo-coo for kitten plops, decides to use the litter box while he’s in there. Weeks pass. I uncover a hidden lake of dog piss, and am never getting my deposit back.