Better late than never

Good morning! How many sheep do you have?
I have twenty.

One, two, three... twenty.
So many sheep! Yum!

How are you?
I'm not so good. I have nineteen sheep now.

Mend it now!
It's too late.

Oh no! Eighteen sheep now!
That's not too late.
? Question: How many sheep does the man have at first?

Twenty./Twenty sheep.