Sentence:  Weanlings grow into feeder pigs, and feeder pigs grow into slaughter <WSD>hogs</WSD>. ... Ultimately the end use for virtually all pigs and <WSD>hogs</WSD> is to be slaughtered for the production of pork and other products. 
Meaning of the word marked with <WSD> tags:  An adult swine (contrasted with a pig, a young swine).