I've had my nubians for almost a year now, a mama and her weather. They've always gotten along great, she's seriously mother of the year. Although he's just about bigger than her, she still sleeps him between her and the wall for protection and at almost 9 months old I caught her letting him nurse. Anyways I walked back to the pasture today and caught them going at it. At first I thought it was play but when they didn't stop when I walked up I realized they were full on fighting. You could hear their skulls cracking against each other. I broke them up but now I'm concerned, should they be separated for a while, or is this just normal goat behavior??