My 5.5 month old kitten Tiger is starting to annoy the older cats! He does it with the dog as well, but it's more funny with him. With the two older females - he will rise up on his back legs and bat at them with his front paws when they are just sitting there doing nothing! They do not like him at all!!! I'm wondering if he is being aggressive/dominating or just playing? He is due to be neutered at 6 months old, but I wonder if it is because he is reaching sexual maturity?