John Peter Haines (1851–1921) was President of the American Society for the Prevention of Cruelty to Animals (ASPCA) from 1889 to 1906.

[2] Haines was on the executive committee of the American Society for the Prevention of Cruelty to Animals (ASPCA) for 14 years.

[1] As president he expanded the organization and improved the headquarters of the Society by designing newly built file rooms and an ambulance house.

[3] In 1903 he stopped the owners of the Coney Island Luna Park from conducting a public hanging of an elephant named Topsy saying it was needlessly cruel and animal deaths should not be a public spectacle.

Instead, he agreed to a more private affair that included poisoned carrots with cyanide, electrocution, then afterwards strangulation with a winch.