Thank you all for your amazing advice!!

I've decided to not let the cats into the room when they are eout of the cage and to move the bird cage to another room where the cat cant go when no one is home.

As for when we are home, I will watch the kitten very carefully around the birds. If she learns to ignore them, then all is good. If she constantly wants to attack them, then I might need to move the birds to a place where the cat will never be allowed to go. But the only place I can think of that would work is my bedroom, and it's best not to keep birds in a bedroom, but we'll cross that bridge when it comes to it.

Again thanks a lot!!