This is bit misconception, pigs are really similar to us and we can get BSE or how is it called in humans (it has several names according to the animal that gets the disease).

The problem why the BSE got out of hand was because they used these parts as feed for another animals.

To be honest I understand the children here. The saving part of me just understand that it is better to use everything.

It’s pretty much the same with pigs, only part that isn’t used is brain.

Drained pond. I am 99% sure about it.