Quote Originally Posted by SANDY FROST View Post
Is it possible that Monroe saw another kitty looking out the window and took it out on her sister. It's called redirected aggression. I've had cats related or non-related and this happens. I f I see this happen I get a toy to distract the cat and another good thing is get a humming bird feeder makes a great cat TV he'll watch for hours.
It's usually his allergies that make him uncomfortable and therefore aggressive. Now that he has been on Apoquel for a while, his skin is great, and he's a lot better with his sister.