There's a cat here (two families live in one home.. us and a family of four with a dog and a cat. Up until the past week the cat has always used the litter box. But now suddenly (we just moved in to this place a month ago) she has taken to peeing RIGHT in front of our door on the concrete. I`m getting sick of getting up in the morning and walking out the door right into cat PEE. She is very old... around 15 or 16 years to be exact if not a little older. But she always seems to use her littler box except for now (she still does number 2 in the litter box) we have tried washing it with bleach, using bakingsoda afterwards to dull the smell even more but she won't stop... her owner says its her way of preventing our dog from coming into their house (as we all take the dogs out the same door into the back yard which is fenced in) though I don't see why because she didn't do this before and we`ve had the dog since November (we lived in the converted garage, now we live in the finished basement.) I`m getting sick of this and I don't know how much more I can take of changing my socks twice a day because of it, having to lightly shove my dog past the doorway (he won't cross over it unless you force him to) and it's the only way to take him outside as our entrance way is not finished being built yet. Does anyone else ever have this problem. If so what did you do