He dwarfs his mother. The white goat with him is his aunt who is large for her breed and bigger than his mother. Built like his father who was Boer. He acts like an intact billy goat. My research on his behaviors say he was probably  not fertile until now.  They say one testicle may have receded when he was banded and this extra natural breeding push of this season has made him fertile.  We won't know for a while if it's true. But he interacts with females as though it's true. 
He is the most impressive looking goat I have ever been around. But we can't keep him here as we can't logistically manage a fertile buck. He does everything a buck would do, which means all the headaches of a fertile buck, including getting bossy around grain feed. He was treated as a beloved pet his whole life, I don't know his weight but would guess around 200.