Kitten playing too rough?

He will be rough because he's a baby. It's the way he is. All babies play rough. My puppy likes to chew and gnaw on the adult dog.

Let the two go at it. Keeping them separated will just prolong the problem because the kitten will always have his habits. Let them just roam the house and when the baby pounces the elder, she will teach him not to be so rough. They will work it out together. - If they continue having a problem, just ignore them. They will eventually teach each other to keep their own boundaries.

If you hear them going too much, you can either break it up (it will hurt) or just let them work it out then stop. Cats, especially when they live together, will stop their fights after a few moments. They wont kill each other.

Kittens play aggressively because that's what comes naturally to them. Many people get a kitten believing that they are sweet cuddly little pets but be aware they have their moments. Kittens can be all teeth and claws! You have to remember that kittens have an instinct to play rough. It is part of a normal kitten's development to play aggressively because they are learning the predatory skills that a cat in the wild would need to know for survival. On a reassuring note, most kittens grow out of the aggressive stage and grow into adorable, sweet natured cats who would never dream of biting or scratching you.

The older one will teach the younger one some manners. That is exactly what his siblings would have done. In the meantime, keep his claws trimmed short and he'll do less damage. Encourage them to play together with an interactive toy like a laser pointer, a wand toy, or a fishing pole toy. That will tire him out and allow them to play together nicely.

some kittens will always be not so nice as other kittens so this is the possibility

whenever she growls and stuff just stop her and tell her it's not right, she might learn. cats don't understand words but they understand tones.