Cats playing too rough

Question
We adopted two brother kittens this summer to join our two yr old girl cat.  They are now 8 1/2 months, she is 2 1/2 yrs.  We live in a one level condo and all cats are indoor cats.  The transition has had its ups and downs, but the past two weeks, the boys, who are now larger than the girl, seem to have become obsessed with chasing her and they are making her (and me!) a nervous wreck.
When they first arrived she seemed to etablish her dominance which we thought would endure, but now it seems that is changing simply because there are two of them and they are bigger.  This is upsetting.  The boys aren't mean, but they are (very) persistent and they go after her together which completely overhelms her.
We keep them separated when we can, but none of them like being behind a closed door, plus space is limited, so separating them is not much of an option.  I could use any suggestions and words of encouragement.  I'm hoping this is something the boys will grow out of....soon! Thank you,

Jonquil R.

Answer
Hi Jonquil,

I have to ask, are the boys neutered? If not get them done. This will take care of the problem. If they are fixed the next thing to do is get some Feliway Comfort Zone and try that. This should help calm things down.
Get yourself a water pistol. At the first sign of aggressive behavior by one of the males spray them. You need to interrupt this behavior. Or if you don't want to spray them get a laser pointer and redirect their attention by playing with them. They should stop this behavior in a while. As they get older they will get calmer. You just need to be patient. Good luck.

Ciao, Karen