He's apparently convinced that he's the Alpha.
So you have to let him know who's really in charge- if he gets too feisty again, hit him in the face with your knuckles like you're knocking loudly in a door and yell loudly at him. If that isn't enough, give him a good hard swat or even a small kick to get the point across.

Oh, and very important- make constant eye contact with him. Glare into his eyes as you yell at him.

I've had to do this with a variety of animals over the years. At first they're sullen and skittish, but if you reward good behavior by fuzzing him up and snuggling him and giving him treats and respond to bad behavior sharply, immediately when it happens, they'll learn their role pretty quickly.
( The Resident Loon Not a demographic. Do not measure., Tue 2 Feb 2010, 14:19, 1 reply, 16 years ago)

I couldn't hit him
I don't think cats learn in that way anyway, do they?
( Roota zweeeeeoooooowm, Tue 2 Feb 2010, 14:29, Reply)

Trust me, they do.
The thing is it takes a combination of positive and negative reinforcement. It's not as straightforward as with a horse or a dog, but it does work.

(Sometimes, I'll admit, it's a lost cause- I just had to put up a baby gate to prevent my elderly Siamese from pissing in the kids' bathroom.)
( The Resident Loon Not a demographic. Do not measure., Tue 2 Feb 2010, 22:57, Reply)