How To Calm A Crazy Kitten?

My cat has been acting very crazy lately. He used to be a not so-crazy cat (he would stalk my husband, but only when he was home), but now he’s like…fluffy all the time. I feel like it’s because of me, since I got another kitten and his food bowl is bigger than mine! Is there any way to make him calm down? And yes, this is an issue that will NEVER go away if you ignore it! Ignore it at your own peril…it may get worse before it gets better.