Legislation and red tape are all encompassing unfortunatly.
A friend tried to find a way around having to send his cattle to an abattoir to be slaughtered, but it was not possible, so he used a small local one, they had a bit of compassion for their job.
He only ever had three bullocks, all at different stages. When one was finished and ready for slaughter, he would buy in another calf, thus ensuring that he always had two bullocks on his smallholding at any one time. They almost became family pets and would follow him around. His kids loved the cows as much as the family dog.
He dearly wanted his cattle to be slaughtered on his holding and not have the stress of being loaded up and run down the road in a trailer.
I'd imagine if school kids had a day at an abattoir, 80% would become veggies immediately.