Party Pooper

well, first of all, i think 你 answered your own question. try moving it somewhere elso thats not 由 your 猫 litter box. if that doesnt even work, then get rid of it (THE PAD, NOT THE DOG!)! some 狗 (like my lab) just dont like going inside! its in a 狗 genes to go outside. 或者 maybe the smell got kitty litter on it, 或者 your dog just dosent like that smell. 你 dont have a bad dog, but there is something on that pad that he prefers wouldnt be there