Animal control officer Wanda Snell knows what she saw: A veterinarian inserted a needle into the black-and-brown mutt and injected a chemical meant to euthanize the dog no one had adopted. The animal moved a bit and was still and quiet by the time she left the shelter for home.

What Snell can’t explain is how or why a mixed-breed dog that nobody wanted recovered overnight and has since bounced back fully from what should have been a lethal injection. MORE