I'm Scourge, leader of BloodClan, (I don't care if he died in the books, he's my favorite!) If you mess with my clan, you're asking to be killed. Every cat fights for themselves. I enjoy driving cats from my territory, or killing if they committed any crimes against BloodClan. Or if they're Clan Cats. 

A quote from Warriors: Long Shadows: Page 272 to 273: Ashfur:
"Upset? I'm not upset. You have no idea how much pain I'm in! It's like being cut open everyday, bleeding onto the stones. I can't understand how any of you failed to see the blood."