I am slowly socializing my cats after having them separated for almost two months. Jazzy is the youngest and newest. She seems very playful. Nyke is the resident cat and a few years older. I'm not sure if he's playing or being aggressive. They chase one another equally. Like hide behind things and pounce. It's cute and I think great! They're having fun. But when Jazzy gets too close to Nyke, he swats her, hisses and growls. That's not good. Is he setting boundaries or is all of his behavior aggressive. I ask because he started chasing her across the house and under the bed. I thought that was too much so I separated them again.