Milkcow Calf Blues lyrics

(Robert Johnson)
Tell me, milk cow, what on earth is wrong with you?
Tell me, milk cow, what on earth is wrong with you?
Well, well, you have a new calf, hoo hoo, and your milk is turnin' blue
Your calf is hungry, and I believe he needs a suck
[Spoken:] Now, you know that calf done got hungry
Your calf is hungry, and I believe he needs a suck
Well, now, but the milk is turnin' blue, hoo hoo, and I believe he's outta luck
Now I feel like milkin' and my, cow won't come
I feel like churnin' it and my, milk won't turn
I'm cryin' plea-hease, please, don't do me wrong
You can give-a right milk and butter, now, baby, you-hoo, will stay at home
My milk cow been ramblin', hoo hoo, for miles around
My milk cow been ramblin', hoo hoo, for miles around
She been troublin' some other bull cow, hoo hoo
Lord, in this man's town

Submitted by Guest

What do you think is the meaning of Milkcow Calf Blues by Eric Clapton?