I absolutely loathe cruelty to animals but I'm not surprised they couldn't find a vet or a farmer to come out to assist. It's hard enough to find a large animal vet even in farming areas, no one wants to do it as it's dirty, dangerous and the hours are dreadful. Also vets don't have access to anything that will stop a panicking animal from a distance, they need to be up close to sedate and it doesn't seem as if that was possible. fwiw once adrenaline kicks in, animals lose all sense of self protection and can be very dangerous. My experience is with horses and tbh I would not want to try to stop even a small pony that is panicking unless it was my own and then I'd be extremely wary and would try to herd it into a field, not stop it. My local farmer used to have a dairy herd and he was up to start topping my land yesterday. He would not have turned out either! I hate the idea of ramming a calf but I can totally understand why it was done.