What to do about an aggressive 11 week old female Tonkinese kitten?

Question

I've got three kittens: 7 months old, 11 weeks old and 8 weeks old.
When I brang the new Tonkinese kitten (Polly) home, my 11 week old Tonkinese kitten (Lia) started acting very aggressive to everyone and everything.
I'm sure it has to do with getting another kitten so soon but why is she so aggressive towards people?
She isn't ever aggressive towards Missy (7 months) because Missy is much bigger than Lia.
Whenever I pick Lia up or stroke her, she will try to bite and/or scratch me.
She hasn't been like this before.

What can I do to calm her down?
Also, I kept Lia and Polly seperate for the first 3 days and since then, I have let Polly walk around the house freely.

My kittens have a bowl of dry food and two double sided bowls with wet food and dry food in it. I don't leave food out all day as Missy is now over-weight. They all share bowls and don't use a special bowl.

They also share two litter trays so there isn't a territorial problem between Lia and Polly (I don't think).

I thought that if they were both around the same age, they would get along fine.
Lia has her moments where she is very affectionate and loving and then she goes all crazy at the sight of Polly.

They play with each other (while Missy lays back and watches them run around!) and I've seen them sleep on the same bed so maybe that's a good thing?

Answer 1

11 weeks is about when kitties get a little nutty. Maybe having the new one around hasn't helped; but because they're both young I would think they should eventually get used to one another.

I think (maybe I'm wrong, of course) its just the 11-week-old little ladies' age.

If, by any chance, the smaller kitten is the reason she's a little frazzled maybe just keep them apart as much as possible until they both get older and have figured out the other isn't a problem.

Answer 2

She was the alpha kitty, numero ono, and ya got two more, maybe shes just being territirial, but i think shes just mad at ya shell get over it, shell get used to them, and start showin them the way... give her love and assurance, she'll be fine...

Answer 3

Throw the cat monster into wall........if don't learn...do again......and again........if still don't learn, cat dumm try again