1 Henry VI: Talbot’s deer metaphor

From William Shakespeare’s Henry VI, part 1 (IV: 2):

TALBOT:

He fables not; I hear the enemy:
Out, some light horsemen, and peruse their wings.
O, negligent and heedless discipline!
How are we park’d and bounded in a pale,
A little herd of England’s timorous deer,
Mazed with a yelping kennel of French curs!
If we be English deer, be then in blood;
Not rascal-like, to fall down with a pinch,
But rather, moody-mad and desperate stags,
Turn on the bloody hounds with heads of steel
And make the cowards stand aloof at bay:
Sell every man his life as dear as mine,
And they shall find dear deer of us, my friends.
God and Saint George, Talbot and England’s right,
Prosper our colours in this dangerous fight!

(Talbot uses a metaphor comparing the encircled English to deer who will fight back against the dogs that threaten them.)