Life is awful for a dog used as a subject in laboratory experiments: The only home he knows is a stacked metal cage in a basement lab, the only light he sees is fluorescent, he's never felt a gentle touch or a belly scratch and he associates humans only with pain.
"Dogs are commonly used in toxicology testing, which essentially means they are exposed to or injected with certain toxins at increasing levels to determine at what point they become ill," Kevin Chase of the Beagle Freedom Project told The Dodo. "Even if the research is not overly violent, the living conditions are bleak."
Hundreds of nameless dogs and cats live like this in the U.S. Many dogs used in labs are beagles, whose calm temperament makes them "ideal" test subjects. According to the Humane Society, dogs used in experiments are sometimes plucked from shelters or rounded up off the streets. Sacrificed for science, they're used in experiments until they're no longer needed, at which point they're often euthanized - no chance for a loving family, no sunlight, no belly scratches.