My fiance has a huge male cat. It's super sweet and a bit of a wuss and push over when it comes to other cats. I have found though, if he has had some catnip, he gets aggressive toward other cats. I like to pump him full of as much catnip as he likes and then send him outside to kick some cat butt.
I have fed him fresh catnip from the garden and some dried stuff from Pet Smart called "cosmic catnip."
I let the cat eat as much as he wants. There are 3 other cats at his house and they are fun to feet it too as well.
Is it bad to feed a cat that much catnip, even though he loves it? He can eat up to a cup of it at a time.

I want the cat to stand up for himself and become the king of the neighborhood. Alpha Cat Cashie Pants shall be his title.......