This may seem like an obvious question to some, but I am really curious about how each of you determine which ND bucklings are "worthy" of staying bucks and which should be wethered. Sure, if there is an obvious defect like an extra teat/teat spur, overbite/underbite, etc. I can see how a decision can be made quickly, but what in particular makes you give notice to a young buckling . . . and at what age do you usually make your decision?