Immunocontraception and other fertility control methods offer a non-lethal way to manage wild deer, horse, and boar populations with welfare benefits.
Wild ungulate population management creates genuine welfare dilemmas. Lethal culling is effective and quick but raises ethical concerns, particularly in urban settings where public opposition is high. Fertility control offers a non-lethal alternative that avoids the suffering of killing but requires repeated treatment, is slower to reduce population size, and has logistical challenges. It is most appropriate where populations are isolated and accessible, public sensitivity is high, or lethal methods are legally or socially constrained. A welfare-conscious approach evaluates population impacts, individual animal experience of treatment, and long-term outcomes rather than choosing a method based on convenience alone.