Dehorning cattle is one of the most common painful procedures in livestock farming, with polled genetics and early disbudding with analgesia offering welfare improvements.
Cattle dehorning and disbudding welfare has received sustained attention from animal welfare scientists because the pain is acute, clearly demonstrable, and largely preventable. Studies using cortisol measurement, behavioural pain assessment, and the newly validated Calf Grimace Scale have established that disbudding causes significant acute pain, and that even with local anaesthesia, the post-anaesthesia recovery period involves continued pain that requires additional analgesia. In adult cattle, dehorning involves bone cutting and causes pain and stress at a scale that is difficult to fully manage with available analgesics. The existence of polled genetics - natural hornlessness inherited as a dominant trait - provides a definitive welfare solution: if polled animals are selected for breeding, dehorning becomes unnecessary across the herd within a generation. Polled genetics are available in all major dairy and beef breeds, and genetic selection for polledness has accelerated with genome-wide selection tools. The barrier to adoption is primarily that polled animals have historically shown slightly lower production traits in some breeds, though this gap is narrowing rapidly as polled genetic lines are improved.