At my brother's last school, they kept pigs. They got them as weaners (thank you, Neil, on the Archers) and had to look after and grow them. They then sold them on and started the process all over again.
My last school didn't keep animals, but it did keep boys. To my knowledge, it had done so since 1854 (when it was a school for orphans and necessitous children). The school took fee-paying boarders and day pupils from 1862 to support the orphans. They were still doing this in my day and, as far as I am aware, currently. People often forget that not all independent schools are single-sex, although many are. And they forget the good they have done for centuries.
No one will convince me that this school did not serve all its pupils well. The English education system was built and changed over the centuries. It may not be possible to change it overnight in the way some aspire to. I hope it isn't. I would rather they did it well. But those who propose the total abolition of private education seem to forget
a) we have a democracy and
b) so often,"perfection", particularly when defined by a minority, is often the enemy of the good.