Harvey has always been fastidious about her litterbox habits. She always peed in the back left hand corner of her litter box. Always. Last week she peed outside her litterbox, about a foot away from it. I cleaned it up and sprayed a vinager mixture to mask the pee smell so she wouldn't be tempted to do it again. This week she has started using the far right hand back corner to pee in. I wouldn't be concerned ex let that she peed outside her box again! This time it was less than afoot away from her box. Seriously?! What is going on? She is a year and a half, in excellent health, get plenty of excercise and yes she is spayed. Nothing in her life has changed either. Can anyone tell me what is going on?