Hi all. Here's the backstory: We got the keys to our house 3 weeks before moving in. During the 3 weeks I visited regularly to speak to tradespeople working there and noticed a cat who lives nearby was obviously very used to coming into the house.The previous family also had a cat aswell as a dog. This visitor was most put out that I wouldn't let him in/engage with him but I had to stop myself because of moving in with our own cat. Anyway, after moving in the cat came regularly, howling at the back door and scratching at the doors and windows which really upset our boy. Once the time came for him to be allowed out, a number of battles ensued and it then seemed that they had come to their own arrangements about who was out and about in their shared territory at which time (our boy likes to be out and about first thing in the morning). All was quiet for around 18 months with no visits from the other cat. Then around 3 weeks ago, he reappears and the whole thing starts again, scratching at the doors and windows and appearing every time our boy wants to go out (cue shrieking and howling and a few chases and nasty fights) Ours is now frightened to go out and has had a couple of pooing accidents during the night, probably when the other one's scratching at the window. HELP!! this us really affecting him and he's so miserable and frightened 