@Bluetoybear
He has stopped knocking now.. I have my bedroom window open as it's so warm tonight and he had been knocking and saying to his wife who was outside 'I know she is in there!' my husband was fuming on the phone and is going to come home a couple of hours earlier from work tomorrow to go straight round and see him! I have had surgery on my shoulder so was resting in bed with a book as it's still very sore. Little dog was barking and was no help whatsoever
First thing I would do (as soon as you can) is write everything down and then call your local council and ask to speak to the dog warden. Please do not agree to anything at the moment until you have taken advice.
My 33kg dog is terrified of our indoor cat who weighs 9kgs and would beat the shit out of him. However, if a neighbours cat was to come in our back garden, my dog would more than likely attack it - and badly.
I spoke to our local ranger (we are in Australia so its done a bit differently here) and was told that it is perfectly natural for dogs to not tolerate other cats or dogs in their garden, they can see them as a threat.
I have warned one of my neighbours to keep her cat out of my garden because if I am at work, then who knows what may happen.
Please talk to the council, I know you are upset and worried and I dont blame you but do not agree to anything yet until you have taken advice. If this man keeps at your door then call the police, he is bullying you and that is not fair.
I would hate the thought of my dog attacking/killing a cat but he will defend his garden and if I am at work, there isnt much I can do to stop it. So I can imagine how distressed you are.