Fallow deer are widespread across the UK and Europe in both managed parks and wild populations, with welfare challenges relating to population management, disease, and road mortality.
Fallow deer in managed parks often suffer from overgrazing due to high stocking densities, with malnutrition visible in poor body condition, particularly in harsh winters. Culling is necessary in both park and wild populations to maintain sustainable numbers, but welfare during culling depends on skills of managers. Deer injured in vehicle strikes often suffer prolonged distress before being found or killed humanely. Antler velvet removal in deer parks for velvet trade purposes, practiced in some countries, causes significant pain. Deer fencing that is inadequate can cause entanglement injuries and panic-related deaths. Respiratory disease outbreaks in high-density park populations are a welfare concern.