Posted: 20/06/2013 at 18:09
I would stick with the water pistol if I was you. I have 3 cats who were all trained with spray bottles filled with water. They soon learn not to do something. I don't even have to spray mine now if they are being naughty just the sight of the spray bottle puts them off and they don't do it again.
The advantage of spraying them with water is that you are not going to hurt them so shouldn't get complaints from owners. Most cat owners I know use water sprays themselves so wouldn't mind.