I'm after a bit of advice.
I moved home 6 weeks ago with my 7 cats. We have moved from a 1 bed flat to a 3 bed house.
They all seem to be settling in and loving all the new extra room with there big cattery out the back.
However, one of my male cats has began hissing at the other cats when they approach him. If one of the other cats is walking in his direction, he begins to growl and hiss, sometimes he tries to swipe them and then he will run away. He is fine with us, and still comes for lots of fuss. He has lived with the other cats all his life, he is 12.
Is he unhappy

pls help
Many thanks