I laugh as I chew

When we were young - it was only a game
You would win - at everything
Chilhood rivalry - developed and grew
Games became battles - the I would always lose
Now you're a big shot - controlling my life
Causing me nothing - but pain and strife
But I know your weakness - you haven't a friend
Except from your puppy - who soon will be dead

Here is your puppy's head
Your only friend - bloody red
It's all your fault - it is dead
Tides have turned - now you lose
If you want the rest
It's too late - there's nothing left
Mangled poodle - makes good stew
I ruined your life - I laugh as I chew