Your experience with the 'older' calf reminds me of a friend who was a PHD Chem Engineer, and carefully studied every situation in fine detail, including two bull calves on his hobby farm that kept growing (as he studied the 'process' of fixing them).
So, after studying the band method (needed a tool), hiring it done (didn't want to spend that kind of money), or pinching the cords, he eventually opted to buy the pinching tool.
Well, after bull dogging the first calf, not knowing that the pincher was to do ONE side at a time (he tried the whole scrotum), he couldn't get the pincher to close (kind of a 'over dead center' deal and 'snap shut' to know when to quit), so gave up, let the calf go, and asked the neighbor farmer what he was doing wrong. The farmer had a good laugh (at the calf's expense) and told the the guy that the idea was to pinch one side at a time. So, he caught the second calf (which was unwary of what was happening), because he couldn't catch the first one again. /forums/images/graemlins/grin.gif
Managed to successfully fix the one calf, but never caught the other one. Had to sell it as a young bull. No one could get near it. /forums/images/graemlins/blush.gif /forums/images/graemlins/grin.gif He also never had a reason to use the pinchers again, which were pretty expensive. /forums/images/graemlins/wink.gif