Deer populations have grown substantially in many regions, creating welfare issues for deer themselves and ecological damage. Managing deer populations in welfare-conscious ways is an ethical and practical challenge.
Wild deer welfare involves consideration of both individual animals and population-level welfare. Individual deer may suffer from vehicle collisions, CWD, winter starvation, and predation - all welfare harms. At the population level, overabundance leads to habitat degradation that reduces food quality and quantity, potentially resulting in chronic nutritional stress for large numbers of deer. Hunting as population management causes the welfare harm of death and potentially painful wounding, but may reduce the chronic welfare burden of starvation and disease that accompanies overpopulation. Contraception eliminates the acute harm of hunting but requires significant ongoing resource investment. Welfare-conscious management selects the approach that minimizes total suffering across the population.