In the early 2000s in New York City, tens of thousands of animals were euthanized each year in shelters due to a lack of public awareness of the adoptable animals available. Many groups worked independently to find homes for these animals, but a lack of communication and coordination among these groups, the City shelter, and the City hindered their efforts. When Mayor Michael Bloomberg took office in 2002, Jane Hoffman, one of the founding members of the New York City Bar Association’s Animal Law Committee, co-wrote a memo highlighting challenges faced by the city shelter and asked for collaboration with the City government. Her memo began an ongoing cooperation with the City and spurred the creation of the Mayor’s Alliance for NYC’s Animals, a private non-profit. This case study tells the story of the Alliance, which provides services and resources to coordinate and enhance the rescue efforts of more than 150 animal rescue groups, City departments, and private companies like Petco.