why sauron cant breed werewolves/dragons?

[Belegorn]

Originally Posted by tom the eldest

Why sauron cant breed them,like morgoth did?is it because he dont have enough time?

Sauron was the creator of the werewolf. He did so by putting spirits inside the bodies of wolves. It's said that, "Sauron brought werewolves, fell beasts inhabited by dreadful spirits that he had imprisoned in their bodies." [Sil., p. 198] Also,

"Men called him Thu, and as a god
in after days beneath his rod
bewildered bowed to him, and made
his ghastly temples in the shade.
Not yet by Men enthralled adored,
now was he Morgoth's mightiest lord,
Master of Wolves, whose shivering howl
for ever echoed in the hills, and foul
enchantments and dark sigaldry
did weave and wield. In glamoury
that necromancer held his hosts
of phantoms and of wandering ghosts
of misbegotten or spell-wronged
monsters that about him thronged,
working his bidding dark and vile:
the werewolves of the Wizard's Isle." [Lay of Leithian, v. 2064-2079]

Sauron is even called the Master of Wolves. So he could, and did, make werewolves. I'm not sure why he did not in later Ages, or if he did.