Recently I took in my grandson's kitten,I already had a cat and a dog,well anyhow, my 10 year old mancoon cat, uses my dog's puppy pad's and his bed to urinate in,this is getting very agervating,this has been goin on now since 2 week's after I took the kitten in, It's not cause the litter box isn't clean, cause I keep a close eye on it.
can anyone out there help me please?

cutie08

sometimes when you have a cat and then after you get another one if it uses your cats litter box then the old cat will stop using it and use other thinkgs like the wall floors couches chairs ect. so why dont you try getting another litter box and keeping the cats in a diffrent room for a little bit and see if your old cat uses the litter box again