Maddie's Fund is a philanthropic organization founded in 1994 by Dave and Cheryl Duffield in memory of their Miniature Schnauzer, Maddie. The foundation is dedicated to improving the lives of companion animals by reducing shelter euthanasia rates and promoting the adoption of healthy and treatable pets. Its mission is to create a no-kill nation where all animals are guaranteed loving homes.

The foundation awards grants to support various animal welfare initiatives, including shelter medicine education and community collaboration programs. With over $301 million in grants awarded, Maddie's Fund invests in programs that promote spay/neuter campaigns and humane management strategies for community cats. Key initiatives include the Million Cat Challenge, which focuses on improving outcomes for cats in shelters. The foundation also collaborates with academic institutions to advance best practices in shelter medicine.

Maddie's Fund serves animal shelters, rescue organizations, and veterinary programs, ultimately benefiting companion animals and their families. Its work is rooted in a commitment to compassionate animal care and shelter reform, honoring the joy that pets bring to our lives.