[@Howler]: The beds in the prison complex are actually padded with some sort of red cloth. They're not just slabs of durasteel. We designed the prison to be relatively comfortable, but lacking in privacy. They'll essentially be treated just as well as any students at the Sith Academy on Korriban. If you ignore the torture, of course. Another thing to note is that though they're not up on the Kaggath, the Sith would also have captured a good number of younglings and initiates, ones who have yet to become old enough to become padawans. Those children would have been sent directly to Korriban, as they would have far less Jedi indoctrination for the Sith to purge. Some of course would not have survived to be sent there. And though the empire as a society isn't speciesist, there are individuals within the society who are. Its quite plausible that such individuals would "accidentally" kill younglings/initiates of the "wrong" species.