Kitten

I have a very cute kitten.
He's as evil as any from hell.
But as far as keeping my kitten?
Well one day him I will sell.

When walking out the door, one day
He has sitting by my feet.
Innocent though he looked that day
He began my toes to eat.

Quite well I thought of my kitten,
Though few awful deeds he did do.
But when he killed a mouse,
Well that was when I knew.

So now you know how my kitten goes,
Now you know my bad times.
But why then, when anyone asks how he is
That I always answer fine?