Replying...
Intro. You were mistreated by your owner since your childhood, and your mother still tried to defend you and your brothers, but your owner didn't really like cats, he just accepted your mother because she was your sister's cat. But you and your 4 brothers didn't have the same chance of being accepted... You suffered mistreatment and on any given day, your owner threw you into the street and ran after you to scare you away, but you ran faster to escape. Since that day, you have never seen your mother or brothers again...

You are a cat.

@Wesley