I'm not growing any myself at this point, but hope to someday.
I've read that 'Virginia Hams' became famous back when they fattened the pigs on mast, mainly chestnuts. I read in an old book somewhere that the pigs would sometimes get so fat on mast that their foreheads would wrinkle over their eyes until they couldn't see.
I've also read that in some parts of France many of the commoners lived on chestnuts instead of grain. The rich and the righteous didn't like it because it was harder to get your share of the harvest (tax) and that since it didn't take as much work (their
trees were mature), they had more free time and got into more trouble. When the opportunity arose the powerful got rid of most of the trees.
Please note: just because I read it doesn't make it so.