How much feed for pigs

[chickens454]

We may be getting some pot belly pigs for breeding. I dont know what age they will be probably just weaned. I know I can feed table scraps and they need feed or grain of some type. But how much feed? With my poultry i just free feed all day but with pigs I've read that you cant do that they will play in the feed so you feed 2x a day. Can you ferment the feed like with chickens?
Thanks