White-tailed and roe deer in urban and suburban areas face welfare challenges from road collisions, disease from high density, and nutritional stress, while causing significant ecological and agricultural damage.
Urban deer at high densities experience chronic stress from competition for resources, elevated disease transmission including Lyme-infected tick burdens, and frequent vehicle strike mortality and injury. While they appear healthy individually, the welfare of deer in overpopulated areas is compromised by resource competition and chronic disease exposure. Humane fertility control programs in suitable closed populations offer a welfare-preferred alternative to lethal culling, reducing population pressure without the acute welfare harm of shooting.