Tail docking of dairy cattle was once widespread but has been shown to provide no hygiene or health benefits while causing unnecessary pain, leading to widespread bans.
Tail docking in cattle represents a welfare harm with no evidence-based justification: the hygiene benefits claimed by proponents were not supported in controlled research studies, while the welfare costs are well-documented. Cattle tails are sensory and behavioral tools: they sweep flies from sensitive areas of the body and are used in social communication. Removing two-thirds of the tail permanently impairs the animal's ability to perform a natural and important behavior, causing ongoing welfare compromise beyond the acute surgical pain. The persistent efforts of docked cows to manage fly burden using their stumps, their flanks, and adjacent objects are visible evidence of frustrated behavioral need. The banning of tail docking in numerous jurisdictions demonstrates that the practice is not necessary for dairy production and its abolition is achievable without welfare compromise to production.