I have a three year old Siamese cat, been spayed and uses the litterbox faithfully (with exception of being sick) until I got new bath mats down. She would pee on them! If we do not remember to pick it up to lay it on the side of tub to dry, she would "mark" her territory. One time I got mad at her, she would start again and then stop until hubby forgot to pick up the mat off the floor. This morning, AARRRGGGGGH! Another pee spot! That litterbox is CLEAN! And I have not changed litter brands either. I did notice she would go in and use it, and shot out of there like she was shot, licking herself like crazy on her feet and tail head and shoulder. The litter is Tidy Cat multiple cat use. I thought maybe lice, mites or fleas but she has none on her and been on a strict flea program along with heartworm program as well. What IS with this cat?????????? I 've got a mind to give away this cat!