Teddy was never meant to have a name. He was born a number, just one of tens of thousands of dogs—mostly beagles like him, chosen for their trusting, docile nature and compact size—bred in the United States for use in experiments each year. Teddy was meant to live and die in a laboratory, without...

We zigzag from tree to tree, seeking refuge under the leaf umbrellas. Drizzle turns to deluge as we dash beneath a tall canopy to plot our escape. The sky booms. My dad takes my hand, and I look up to see if he shares my sense of foreboding. But he’s smiling at me, his eyes twinkling. He says...