There is a different between enough food and feeling full. Most people want to eat enough to get fat. A slave would be given cheap food, enough that they can work. Starving a slave to death isn't a good use of them. However feeding them so much they get fat isn't economic as well.
Fredrick Douglas didn't have motivation to treat slavery fairly either. (few writers of the day did - thus making it hard for historians to figure out the truth, though in this area there is a lot more data than historians studying something of several thousand years ago).
> A slave would be given cheap food, enough that they can work. Starving a slave to death isn't a good use of them
You might want to check on accounts from e.g. Haiti where slaves' lives were considered very cheap and that's precisely why they were used for the dangerous labour around sugar production.
> Fredrick Douglas didn't have motivation to treat slavery fairly either. (few writers of the day did - thus making it hard for historians to figure out the truth, though in this area there is a lot more data than historians studying something of several thousand years ago).
How does an ex-slave treat slavery "fairly"? He lived that shit, he knows how despicable it is. What other side is there to present? The economic interests of the slaveowners?
There were lots of different slaves, with lots of different treatment. You cannot count a few examples and extrapolate to all slaves.
>How does an ex-slave treat slavery "fairly"? He lived that shit, he knows how despicable it is.
He can exaggerate how bad it was for one thing. It is well known that people's memories are not exact to what happened, and it is likely he would remember dramatic incidents and not the day to day reality.
Try reading "uncle tom's Cabin" - a book that was written with the intent to start the civil war to end slavery. Despite that intent to presents a picture of slavery that was in general much nicer for the slave owners.
Don't take anything of the above as statement that slavery was good. Only that it wasn't in general as bad as what you see on TV.
Fredrick Douglas didn't have motivation to treat slavery fairly either. (few writers of the day did - thus making it hard for historians to figure out the truth, though in this area there is a lot more data than historians studying something of several thousand years ago).