New kitten

Well she was kicked out of her first home for being aggressive to the older cat,(At 8 weeks!)
I have a beautiful 9 month old boy so because they were both kittens I thought they would do well as playmates

He is so placid and patient, but she doesn't seem to give up, she has quite a temper on her.
I have tried water spray, and noise to stop her
I am not sure why shes behaving so badly shes never been hurt in her new home .

Oh honey, haven't you ever been a young one? Full of good food, hugs and loves? Didn't it just make you want to dance forever? Well, she is.

She sounds like my Tammy-Timmy. "If you don't get out of the way fast enough, Pete, I will bite your hind leg and make you move faster." Sound familiar?

How old is she now?

She has never been hurt in her new home... But she has been hurt in her
previous home and se does remember it! And its enough for feeling threatened
for a long- long time. What to do? Only patience and loving and no punishment. The most appropriate way to correct cats behaviour is to squirt them with a sguirt gun. Be patient and loving and youll actually see the
rezult! (i am from Russia, so i beg your pardon for my bad English).

Plus females seem often to just be programmed to be nasty to males at some time - sort of a defense mechanism, even if they're not attacked - they're going to attack first!

Dear Larke! You are absolutely right about defence mechanism, but it deals
with adults or grown up cats and its a part of sexual behaviour. When males
and females are kittens yet, it doesnt matter.
When kittens fight, they usially establish themselves as dominants. I am a
Cornish Rex breeder,I have 3 females and 2 males at my cattery. Thus I
have an everyday opportunity to deal with my dear kittens. If I could speak
Russian here, I would have told you much interesting about kittens behaviour. (Beg pardon for my bad English).

Dasvedanya :-)!

Oh! Bravo. dear Lark!