Fertility control using immunocontraceptive vaccines provides a humane alternative to lethal culling for managing overabundant wildlife populations.
Immunocontraception provides a welfare-positive alternative to lethal culling for managing overabundant wildlife populations. Traditional lethal approaches — shooting, poisoning, or trapping — cause acute welfare harm and can disrupt social structures, sometimes destabilising populations rather than reducing them. PZP vaccine delivered by dart prevents conception while leaving animals otherwise unharmed in their natural social groups. The Humane Society of the United States and other organisations have pioneered PZP use in wild horses, suburban deer, and other populations where lethal management is politically or ethically contested. Expanded investment in contraception research, delivery logistics, and public engagement about humane management alternatives would significantly advance wildlife welfare.