Save Blue the pit bull

Blue is a 3 year old pit bull and he simply made a mistake broke his chain and bit another dog.This was his 1st time he's never shown aggression before he is always friendly to humans and animals he even has a friend named meow meow a 1 year old cat that he plays with everyday, now he is being recommended to be euthanized :( He's just a big baby and he doesn't deserve to be killed for a MISTAKE.He is loved dearly by everyone he comes in contact with, please help save his life.

THIS IS ACTUALLY HIM

http://www.change.org/petitions/save-blue-the-pit-bull#