Ah, there is your answer. If it is not done properly, the types of behaviors you are seeing are common. You might need to inquire with a vet to have it done surgically if you plan to keep that male. Otherwise you will probably need to find him a different home because even a smaller Nigerian buck is a handful and too much for a new goat owner.And he's already pretty bulky at 5 months. It was the people's first time doing the banding, that we got him and our other one from.