Prompt: "As the bird whose owner just died"

I try to reach him,
But I know it's too late,
Pretending to be trapped,
Was this the only way;

The cage is my guard,
My ribs the enemy,
My only friend in life,
Lying dead so close to me.

He fed my soul,
I held my breath,
And mercilessly,
I brought him death,

Now I must fly,
For this poems over,
I am a little bird,
And I killed my owner.