Face flies, horn flies, and other biting insects cause significant stress and welfare harm to pastured cattle. Effective fly control programs reduce this often-overlooked welfare burden.
Biting fly welfare impacts on cattle are significant but often overlooked compared to disease-based welfare concerns. High fly burdens cause chronic irritation, constant defensive behavior, and reduced grazing time — all indicators of ongoing welfare harm. Face fly-transmitted pinkeye causes severe eye pain and potential blindness if untreated. Welfare-conscious fly management combines chemical control with management approaches — rotational grazing, fly parasites, biological control — that reduce reliance on insecticides while providing continuous protection. Monitoring fly burden levels allows targeted treatment when welfare thresholds are reached.