What food my lips have smacked, and where, and why*

What food my lips have smacked, and where, and why,
I have forgotten, and that my bowl has lain
Empty from night till morning; but the reign
Of hunger persists tonight, that makes me try
To wake my human before I die,
And on the carpet there shows a stain
For regurgitated meals that not again
Will I eat though hungry meow and cry.

Thus out the window stands a lonely tree,
With birds I would eat one by one,
Yet my bowl is so empty as before.
I cannot say though all my meals are free,
I only know that after eating when done
A little while, that I meow and cry for more.

*Hat tip to Edna St. Vincent Millay