Help.
I have a 13/14ish year old beautiful, sweet, black kitty named Merlin. (obliged.)
About a year ago, we got a creamsicle kitten, Abomination. In retrospect, this was ill-advised, but it seemed like a good idea at the time. Mina is cute and terrible, and he caused a significant amount of stress for Merlin. He has calmed down significantly as he’s gotten older, but he’s still a bit of a handful. They couldn’t be more different in personality – Merlin is a shy, quiet, almost delicate cat who demands lots of attention, Mina just wants to bite everything and is much more aggressive and independent. Not to put too fine a point on it, but he’s an asshole.
Both are neutered.
The problems started about two months ago when Merlin, after a lifetime of prudent litterbox habits, pissed on my living room curtains, about five feet in front of my face. I immediately took him to the vet, where we discovered he had a bladder infection and urine crystals. We treated the infection, and I kept him in my bedroom for a while so he could get some time away from the kitten, and he had his own litter box and food dish in the bedroom, but I let him roam the entire house whenever he wanted. Meanwhile, the living room increasingly smelled like cat piss. I hate that smell more than almost any other smell in existence. It is vile.
Go back to the vet, and Merlin’s bladder infection has healed, but he still had crystals in his urine, so we switched him to a special dry food and I feed them both mostly wet food now. I talked to her about the peeing in my living room issue and she recommended Cat Attract Litter, and also suggested I not put their litter boxes in the same room (laundry room) because maybe the kitten is blocking his access. So I started using Cat Attract Litter and added a third litter box to the living room, right in the spot he enjoys pissing on so much. Things went okay for a couple of weeks, though the two cats almost exclusively use the living room litter box and ignore the other two. I’ve never seen Mina block Merlin from using any of the litter boxes.
A few days ago my husband was cleaning out some stuff on top of our kitchen island, including a plastic crate. Merlin walked right up to him and pissed in the crate. And since then he’s pissed twice on my favorite messenger bag, also in the living room, while I was sitting right there. I can only guess where else he’s been pissing.
I get that this is a territorial issue, I just have no idea how to stop it. Two days ago I removed Merlin from my bedroom permanently because my allergies just can’t take it. But he had been spending so much time in the rest of the house I didn’t think it would cause much stress. These issues far predate removing him from the bedroom, though.
Literally, any advice appreciated at this point. I already steam cleaned my house once on account of this cat and I am at my wit’s end.