THAT THING AT THE ZOO by James R. Tuck

Shredding monsters is his stock and trade. He sniffs them out, tracks them down, and corners them. End of story. But when the tables are turned, expect the unexpected.
Knowing his enemy is a rule Deacon Chalk swears by. But he's never seen anything like whatever is leaving the Atlanta Zoo's most dangerous predators bloodless, skinned, and hanging high in the treetops. And he's only got until sunrise to keep it from turning the entire city into a slaughterhouse.
Now Deacon is in zoo lockdown...