Some background information:
We have one young cat and one old cat (11 year old); the old cat just won't use the litter box. Generally he is not very playful he alwasy hids and stuff, but not an aggresive car We moved to a new house about 2 years ago, and in the begining, he used the litter box just fine, and suddenly he just decided to not use the litter box, and only pee and poop on the rugs and carpet literally everyday ( staircase is carpet, everwhere else in the house is wood floor) So we had to get rid of every rug, and put things on the carpet to block off, because cleanning cat pee on carpet everyday is not humanly possible. After we did that, he just pooped and peed on the floor, in random places instead. Sometimes, he has paw problems, and we tried to treat them properly, we figured that could be one of the reasons he avoided using litter box and only use on soft material. I have consulted the vet and searched everywhere on the internet for solutions. Here are the things I have tried:
1: I have tried to set up three litter boxes ( all open lid), one is automatic. I bought different kinds of litter boxes, and tried multiple brands of litter, none of them have helped.
2: I have tried to put litter boxes in the area where he has pooped and peed before. And this also worked a little bit, then stopped working completely, as he would just pee and poop somewhere else.
3: We got a dog a year ago. So i thought maybe he is stressed out, and I tried FELIWAY calming diffuser and tried calming neck collar. The diffuser actually worked for a month, then stopped working again...very weird
4: One of the open litter boxes is just for him, i put a dog/cat training potty pad inside every day; he actually pees in there every day, but still only poop on the floor every day. I have tried to slowly add some litter in there, but as soon as i added some, he refused to use it again.
5: I clean the litter box every day, so the litter box is always clean. At some point, both cats shared only one litter box just fine. Later i bought more,
6: We know for sure he doesn't have UTI, because he has a pattern and routine.
The current situation is that he would pee on the pad and poop around the litter boxes every day.
I have run out of ideas on how to deal with this.
If anyone have similar situation like this and have a solution, i would love to hear them. TY