Thread: Help! Aggression problem

Personally speaking I would treat him like a naughty child, TIME OUT, if he is misbehaving then put him in another room for a while till he cools his heels, I also have a water pistol , if any of mine have a hissy fit with any of the others I send a jet of water hurtling at them, over the years it has proved brilliant in stopping all sorts of UN-wanted behaviour, and best of all the cats don't connect it to me, I now only need to pick it up and shake it to send them off in different directions.
It sounds to me like you grans cat is trying to be Alpha dominant, it will be hard but she MUST stamp it out otherwise things will get worse.
It might be an idea that when visitors come he goes to another room, just till she gets him sorted.
Lets be honest these are large cats and could do some serious damage.