There is no evidence that tail docking provides any benefit to the cow through improved udder health or hygiene, and the procedure appears to cause acute pain. Tail docking is banned in California, Ohio, Rhode Island, and New Jersey, and is prohibited in all programs detailed here.
Validus
Tail docking is prohibited from being practiced on the dairy or on owned/purchased replacements, and is considered a critical criterion.
Switch trimming is allowed
Switch trimming is allowed
There is currently no repeatability test for this measure.