COLUMBUS, Ohio—In order for an animal tranquilizer gun to work, it has to fire darts at a rather particular speed. Too slow, and the dart bounces off the animal without injecting the sedative.

In the movies, when an animal gets shot with a tranquilizer dart, it succumbs quickly. That’s not how it goes with Scrim, the Crescent City’s celebrated escape-artist dog. When Scrim was stung ...

Using a tranquilizer dart gun that looked like an assault rifle, a volunteer veterinarian drew a bead on a wire-haired terrier mix named Scrim. The dog had been astray in Mid-City since it fled ...

In the movies, when an animal gets shot with a tranquilizer dart, it succumbs quickly. That’s not how it goes with Scrim, the Crescent City’s celebrated escape-artist dog. When Scrim was stung ...