I was wondering something else about gladiators. Is every single gladiator bred in Allanak, or are some of the gladiators made as non-bred (i.e.: Captured)?
Its considered far more feasible for breeders to have slaves bred and born to make them loyal from the start, unaware of what freedom/personhood feels like, have them be of Allanak, etc. rather than capture someone who may be immediately of combat/breeding/heavy labor age, but harbors thoughts of freedom, making it back home, vengeance, etc. Might be other reasons I'm unaware of.
Another thing about slaves in Zalanthas is they and no one else considers them to be real people. They are highly valuable possessions, best taken care of well so that they are fit to serve you. That's part of why good gladiators are so well taken care of. They put a lot of time and money into those guys, and they give a lot back in return if happy enough to keep working.
EDIT: Another thing, being a slave practically guarantees your food, water and safety, so long as you work hard and aren't extremely unlucky.
As extremely valuable possessions (there's a line graph somewhere, with healthy adult and mul humans being worth the most) most owners aren't going to mistreat their slaves, but I've seen whip scars in the game enough to think that they do get punished for some indiscretions, although I don't know how serious they'd have to be. Unwanted pregnancy maybe, I'm sure that'd get a beating.