Been in my current house 2 years, moved with my 2 cats. Previous owner did not have pets and next doors cat was used to hanging out in my garden. I thought they would work it out and settle down with each other, but next doors cat is getting more and more of a bully. He bit my 12 year old on the ear a few months ago, which ended up getting infected. I have also seen him stalking her a few times - neither time was she aware he was behind her but he was doing that stalking type behaviour. Both times I opened the door and shouted at him and he ran back home. Yesterday I heard a horrible yowling in the middle of the day and went out to find my 5 year old male cornered by next doors cat, with clumps of my cats fur flying around and a ragged patch on his side. I shouted but next doors cat just watched me and I got right up to him before he walked away. Even even then he only just stayed ahead of me - I had to kind of herd him out of the garden. Even then when he reached the fence he sat and stared at me. At which point, I am ashamed to say, I grabbed a small stick and tapped him on the bum with it - not to hurt him, but to give him a shock and make him leave. I feel awful, but his behaviour seems to be escalating and my cats are now really scared. I thought I would get a super soaker - has anyone got any other ideas about how I can make him avoid my garden? It goes against the grain to do this, but I am worried about the safety of my cats. If my dog is around she will go mad and want to chase him off, but she is not always here.