Harvesting antler velvet.
D000671:Amputation, Surgical / Q000009:adverse effects / Q000662:veterinary*; D000701:Analgesics, Opioid / Q000009:adverse effects; D000818:Animals; D000999:Antlers / Q000601:surgery*; D003670:Deer / Q000601:surgery*; D006733:Horns / Q000601:surgery*
D000701:Analgesics, Opioid