We used to have a cat who was mental. She was so angry all the time - it was like she had permanent pms! She'd sit on your knee and you'd stroke her for a while, then she suddenly dig her claws into you, and hiss. She was so narked off and scary she use to chase the dog. He was a soft little westie and was scared of her.

Put me off cats for many years, but I have since started liking them again cos a friend of mine had one that I really liked, and it used to like me. So it was okay!