I have 2 cats. Moose is 2 years BDS. We have recently moved to a house in an new area, there have been a few moving guys and there are people outside buidling our deck. Our cat Moose has displayed some serious aggressive behaviour towards my live in boyfriend and family who enter off the deck into kitchen of our house, to the point where we have had to ask them to go around and come in the garage. He's a pretty easy going cat and this behaviour is shocking and upsetting to me. How do I find out what the problem is and how do I rectify it? Has anyone else had an experience like this?