Much ado about...

A cat bully: big, fluffy, half-siamese, half-persian. S/he moved in next door a few weeks ago and began climbing onto the fence between the yards. This used to be solely my cat's domain - she's bigger than the other neighbourhood cats and has made it known, with hisses and yowls, that our front and backyard is hers. This new interloper shows up, takes a liking to our yard and now my cat's afraid to go outside. I've never actually seen them fight, but I came home from work last week and my cat was very spooked. She was sitting in the middle of the living room, staring at the back door. Her tail was all puffed up and she kept looking around with wide eyes. I checked all the windows and doors to make sure that no one had tried to get in. Then, after coming home a few more nights to find the neighbour's cat hanging out in our yard, I had conclude that s/he had tried to get in our cat door. My response to this is twofold. Partly I want to go over to my new neighbour and politely introduce myself, genuinely welcome her to the neighbourhood, then dob on her cat and insist she teach it manners. The other part of me knows this is completely ridiculous since they're cats. You can't train cats, neither of them are actually fighting each other and mine's not that stressed about staying inside all day, especially given it's winter. So like my cat, I'm going to do... nothing.