Hi. We are a 4 cat household. Originally 3, (2 females and a male, not related, but all around 5 years old.) Titch (who is now not so small :wink has always been the quiet, timid one, but got on ok with the others. Then, we unexpectedly got a 12 week old female kitten in May. Did everything by the book : Kitten stayed in a safe room for a couple of weeks, and then slowly introduced her to the others. All seemed to be going ok; a few hisses etc, but nothing major. Kitten seems to have settled well, and is especially friendly and playful with our male cat. So we thought all was ok; until the other day, when I caught Titch spraying onto a radiator in the lounge! Then my daughter caught her again doing it in her bedroom, where the kitten has her food / water and litter tray etc. Not nice! We have tried to keep Titch happy through all this, and she seems quite playful at times with the kitten, so not sure how we can stop this before it gets too out of control? (We live in a 4 bed house, so they have plenty of 'quiet' spots to hide.) Also they are all out doors cats, as we are quite rural, so apart from the first couple of months, when we had to keep the kitten in, so had to lock the cat flap, they can all now come and go as they please again. We did get a couple of Feliway diffusers at the start to try and calm things, but didn't seem to make any noticeable difference?! Can anyone advise on how to stop this, and also what the best thing is to clean the sprayed areas, so she doesn't go back time and again to the same places...?