I wanted to write an update into this thread. About a month ago, after a visit to the cottage, I thought we had everything figured out (finally). Dante was in a foreign environment, but the urine problem stopped a few days in, with his litter box in the bathtub.
This is when I noticed that he was urinating in the box 100% of the time, but then would stop, start walking, then start urinating suddenly (with obvious surprise in his body language). Realizing that he wasn't urinating out of the box (at least not initially), wasn't peeing over the sides, wasn't peeing vertically, etc. I changed my approach, and built a litterbox fence to simulate having to jump something to enter/exit, like the bathtub.
Unfortunately this hasn't worked out, he now pees on the other side of the fence. I managed to nab a video of it today, any insights?:
Notice he practically falls off on the other side, because he's already started to pee before he can land on all fours, I don't think it's marking (since he goes back and pauses as though to scratch/cover, and there's minimal quiver/a full bladder load).
I briefly talked to a vet about whether or not this was a problem with a narrow urethra, and potential castration (apparently the typical resolution for narrow urethra's/constant blockages), but was told it might just make him incontinent.
Has anybody ever seen behavior like in that video before? It's entirely reproducible, urinates perfectly in the box, takes a few steps (flat ground or otherwise), then suddenly continues mid-step. If something hinders him enough (so he has to turn around a few times in the pan, etc.), he's more apt to start urinating again in the pan.
It's almost like he needs a treadmill in the pan heh.