It depends on what farm
As many as you want! I would recommend not over 50 pigs though because there hard to take care of. Also you might want to check with someone that works for the state in the state you live in for...
Lots of stuff i think. I know if that if they are owned privately they are fed scraps and acorns and old milk but i do not know about farms.
We won't find out until we get an ultrasound done on it or wait until it gives birth.
10 to 16