Who are the "dogs" of Psalm 22:16?

For dogs have compassed me:
the assembly of the wicked have inclosed me:
they pierced my hands and my feet.
Psalm 22:16

"For dogs have compassed me.
Here he marks the more ignoble crowd, who,
---while less strong than their brutal leaders,
---were not less ferocious,

for there they were howling and barking like unclean and hungry dogs.
Hunters frequently surround their game with a circle, and gradually encompass them with an ever narrowing ring of dogs and men. Such a picture is before us.
In the center stands, not a panting stag, but a bleeding, fainting man, and around him are the enraged and unpitying wretches who have hounded him to his doom."
BST