I had a cat that 'marked' his territory in the oddest ways that I don't think expressed anger as much as his evil nature. It wasn't an assumption, he made his disdain for us very clear. He had a litter box in the finished basement laundry room as well as the kitchen on the main floor. He would hold his urine for hours so he could lay pools in the most inappropriate areas. He almost never used his litter box for feces either. Even if locked into the laundry room he would go into the dryer and drop a load onto freshly laundered and dried clothes. He would leave us gifts between pillows on the bed. We were 3 roommates in a 3 bedroom home, 2 women and myself. I recall coming home one afternoon to the telephone ringing. I ran to the closest phone in one of my roommates bedrooms. I leapt across the bed to reach the phone on the nightstand to answer the call. When I got up I had one of his presents on my chest. We weren't allowed pets so we kept Bud a secret. Our landlord came to visit one day and was about to sit in a chair when my roommate saw his gift sitting dead center on the upholstered chair. Halfway into a seated position, my roommate grabbed the LL and told him to sit in an 'more comfortable' chair. Same roommate was in sleeping with her BF one Sunday morning when Bud squeezed through the door, jumped on the bed and let a large pool out on their legs.
I came home one Saturday evening to let Bud out for some exercise before I went out for the night (which I was dressed up for). I tossed my jacket on the couch and opened the laundry room door - where Bud had been sequestered with his litter box. He came out, jumped up onto my favorite deep sea green suede jacket and proceeded to emit a pond of urine onto it.
Did I say Bud was an evil cat?
BTW, I've never owned a cat again.
Bud seemed like a friendly cat most of the time except for his inappropriate bathroom issues.
Teething?
Or maybe you could find some 480VAC cables for him.