I want my dog back

I’ve lost my dog, sir, have you seen him?
He’s black and white and has a funny leash I made for him.
He loves me, and he barks when I am happy.
I sleep a lot these days because he should be there when I awake.
He used to be but now he is not.
I go to sleep so I can wake up. I go to sleep so I wake up again.
So, dear sir, do you think you can help me?
I’ve slept too much.
But still I do not hear him bark.