In this one that I posted earlier, look at the skull. The sides are much different. He looks like he went head to head with a Mac truck. This one is injury.
They are predominately from injury or infection early in the velvet growth stage. A clubbed antler will be replaced the next year with a normal antler if the pedicle isnβt damaged. Rock Chucks bull obviously has an injury to itβs skull and would grow an abnormal antler year after year.