So in the present system is is nearly impossible for some slaver builds to effectively enslave peasants and their ilk, as the Predators tend to eat them before they have the chance to heal to standing. I have two suggestions to help this rather irritating flaw. First, allow healing powders to be used on the slaves, as the title states and the second, a less likely and probably worse, don't spawn the predators for slaves. I would really like to see this changed, because it is becoming quite difficult to get slaver reputation back to 160.
Edit: Yeah, I originally meant the weak variety of healing powder, but most of you seem to have gotten that already...