A warg has an animal body. It has no hands. It is a carnivore.

Suddenly Aragorn leapt to his feet. "How the wind howls!" he cried. "It is howling with wolf-voices. The Wargs have come west of the Mountains!"

"Need we wait until morning then?" said Gandalf. "It is as I said. The hunt is up! Even if we live to see the dawn, who now will wish to journey south by night with the wild wolves on his trail?"
"How far is Moria?" asked Boromir.

"There was a door south-west of Caradhras, some fifteen miles as the crow flies, and maybe twenty as the wolf runs," answered Gandalf grimly.

"Then let us start as soon as it is light tomorrow, if we can," said Boromir. "The wolf that one hears is worse then the orc that one fears."

"True!" said Aragorn, loosening his sword in its sheath. "But where the warg howls, there also the orc prowls."
The Fellowship of the Ring, by J.R.R. Tolkien