I'm glad your not following the world bible like an actual bible. Different districts world have different flavours of progressing. Some house animals until needed. Others categorize and slaughter immediately or, in this case, the centre is dealing with overflow.

I'm very intrigued by the white band idea. The way I wrote Butchers is that they do this they work, they were picked because they enjoy killing. Some Butchers prefer to extend sessions with a single engineer l Animal