Is it normal for a kitten (<6 months) to beat up on older adult cats?
My neighbor has a cat that come by to visit when she is outside. She is really a kitty, less than 6 months old, and skinny. She is perfectly friendly with me, and very energetic, loves play, strings, like what you'd expect.
But when the other nieghbor's cats are out she seems evil.
They are males and much older and bigger than her. You can hear them fighting sometimes. She chases them down and bites them and they scream and run in terror.