Relationship among cattle breed and anabolic implant protocol relative to feedlot performance: Growth, temperament, feeding behavior, carcass traits, and economic return

•Implanted Santa Gertrudis steers had increased chute scores and rectal temperatures.•A high intensity implant protocol increased hip height in Angus steers.•Average daily gain increased by 29% with a high intensity implant protocol.•Average daily gain increased by 26% with a moderate intensity implant protocol.•A moderate intensity implant protocol improved economic return in both breed types.