From disbudding ( Day 0 ) to Day 15 farmer-disbudded calves receiving meloxicam grew faster ( 0.65 kg/day ) than calves without meloxicam ( 0.55 kg/day ; p = 0.011 ) , but an interaction between operator and meloxicam treatment ( p = 0.056 ) meant that meloxicam treatment did not increase growth rates in veterinary-disbudded calves ( 0.63 vs. 0.64 kg/day ; p = 0.872 ) .