pig feed is determined by age of the pigs.
for piglets, starter/creep feed is better.
then growers for those above three months,
sow and weaner may be used for both weaning and for mothers
and pig finisher to ready them for market.
feeding them on minerals including cotton seed cake, fish meal, sunflower etc acccelerates growth rate.
farmers choice mainly blends the feeds as sow and weaner which had all the nutrients for all ages.