I've been having a problem detecting polled or not as well. Because my buck, though polled has those giraffe-like ridges that are quite prominent. I'm having a time figuring out if a couple kids are polled, because there are fairly big lumps growing but no breaking of the skin. One boy with pretty big bumps is three weeks and since I disbud by myself I don't want him to get too big for me to handle. I tried comparing my known polled to horned and I'm not seeing consistency in the fur swirls. The easy ones to tell are when the bumps are pointy; but it can get tough when it's kind of inbetween.