Each year, over 100 million animals, predominantly mice and rats, are used in U.S. scientific research, with thousands of cats, dogs, and primates included. Most lab animals are euthanized post-study for scientific examination, though some involved in less invasive research or breeding may be adopted. The author shares a personal story of adopting Hammy, a beagle retired from lab work, sparking curiosity about the adoption and rehabilitation of former lab animals.

Adoption of lab animals, especially dogs and cats, has gained legal and social traction in recent years. Seventeen states now require labs to offer healthy dogs and cats for adoption after testing. Notably, over 4,000 beagles were adopted nationwide following the closure of a Virginia research breeding facility amid legal action for animal welfare violations. Sanctuaries like Wyoming’s Kindness Ranch actively rehome hundreds of former research animals annually, highlighting growing efforts to transition lab animals to new lives beyond the laboratory.