>>11358499
Makes sense. You don't have to be worried about a rebellion among pack mules, the true mark of a slave accepting it's lot in life is knowing that the only difference between it and a literal beast of burden is that slaves can usually do more than one task.

Presumably being tightly bound physically would come as part of building the tight bonds mentally, I'm sure plenty of slaves spend a lot of time actually directly bound to a cart or similar thing before ever being permitted to serve indoors.