I intend to sing the Watersons' version of Twanky Dillo (which is quite different from the Copper version). Hence I would be grateful for any knowledge there is around about the meaning of the less obvious bits of the words!

^^

The life of a shepherd
Is a life of great care
But with my crook and dog Whitefoot
I shall drive away fear

Twanky dillo twanky dillo,
Twanky dillo, dillo, dillo, dillo
And he played on his merry bagpipes
Made from the green willow
Green willow, green willow,
Green willow, willow, willow, willow
And he played on his merry bagpipes
Made from the green willow

Well if ever my sheep,
Go astray on the plain
Why my little dog Whitefoot,
He'll fetch 'em again

Well if ever I meet with,
The old shepherd's horse
I shall cut off his tail,
Clean up to his harness

And if ever I meet with,
The old shepherd's daughter
I shall block up the hole,
Where she do draw water

For instance, what does twanky dillo refer to and why would one want to cut off the horse's tail and block up the daughter's hole? Thanks!

Green grows the laurel, soft falls the dew ...
Alan