||Intact, sexually mature, male pigs intended for breeding purposes; generally not intended for slaughter in the U.S.
||Castrated male pigs intended for slaughter.
||Female pigs that have not farrowed a little and are intended for slaughter or breeding purposes.
||Breeding female pigs that have not farrowed a litter; usually weigh 220-300 lb (100-135 kg).
||Female pigs that have farrowed one or more litters.
||Pigs from birth until weaning that are currently nursing.
|Starter or Nursery Pigs
||Boars, barrows and gilts from approximately 2-4 weeks of age and approximately 50-60 lb (23-27 kg).
||Barrows and gilts from approximately 50-60 lb (23-27 kg) to 120-150 lb (55-68 kg).
||Barrows and gilts from approximately 120 to 150 lb (55-68 kg) to market weight for slaughter.