Neither has had any problems with using the litter box.
My parents have a male and a female cat as well. We introduced the two parties slowly and they got along great.
One day, Gandhi started spraying things out of the blue. It was infront of my dad. He went after Gandhi and Gandhi scooted and tried to spray again. Dad went after him and Gandhi scooted away and tried to spray again. We put him in the garage and I took him to the vets the next day.
Vet put him on antibiotics for a UTI. He was kept in the garage for a week then slowly let back into the house. He seemed to be just fine after that.
That happened at the end of June. Last night I went downstairs and noticed the dog bed was smelling...and bad. It was cat urine. I washed the cushion and the bed and found that behind the cushion, on the carpet, smelled as well. I scrubbed it three times to get the smell and stain up with that checmical cat urine stain buster we have (we have 3 products). I treated the dog bed with it as well after it was cleaned and put it back.
Last night, around 1am I went downstairs and found the dogbed was disrupted, and the dog wasn't inside. I looked closer and someone had peed in there. I doused it in that stain remover and let it sit. This morning I discovered poop in there!
It wasn't solid cat poop. It was more runny.
I picked Gandhi up and put him in the garage as a precaution and told my dad about what I found. I'm washing the cushion again and Gandhi is hanging out in the garage with his own cat litter box. If it's Gandhi, the problem should stop in the cat bed. If it isn't, it'll continue because the 3 other cats are still inside.
The cats have 2 litter boxes in the basement (low traffic area) that are cleaned at least twice a day. My stepmother cleans them in the morning, I clean in the afternoon.
I'm HOPING it isn't Gandhi again. Though we just caught him spraying 2 months ago, which was very unlike him. We took him to the vets and got him on antibiotics and everything went back to normal. He sprayed, but he wasn't NOT using the litter box. The stuff I found yesterday was a full urine passing and then there was the poop. So someone isn't using the litterbox at all.
The only other cat I have suspicians about is my stepmother's cat who hasn't been eating as much as she used to. She's overweight and should be dropping some with how much she isn't eating, but she's still fat.
Gandhi doesn't appear to be ill. He's active and playful.
Is there a way this couldn't be him again? I'm really worried about his future if it is. My parents don't tolerate an animal that soils in the house and I'm not yet on my feet enough to move out. If its him, I'm guessing we are going to the vets again to try and fix the problem once more.
What would cause a cat to use the dogbed as the litterbox if they have 2 litter boxes that are cleaned twice a day? Can it be a mental issue or would it be medical?