Heat events kill thousands of feedlot cattle annually and cause prolonged suffering in many more. As temperatures rise globally, heat mortality management is becoming a critical feedlot welfare challenge.
Heat mortality in feedlots represents an acute welfare failure that is entirely preventable with adequate infrastructure. Cattle dying from heat stress experience hyperthermia, muscle breakdown, cardiovascular collapse, and neurological impairment — a prolonged and distressing death that may take hours. The welfare harm extends far beyond deaths: cattle experiencing sub-lethal heat stress are in discomfort for extended periods, with reduced feed intake, elevated respiration, and compromised immune function. As global temperatures increase, the frequency and severity of heat events will grow, making heat abatement infrastructure — shade, sprinklers, ventilation — a non-negotiable welfare requirement rather than an optional extra. Regulatory requirements for minimum shade provision in feedlots are increasingly being considered as a welfare baseline.