They can jump right into the pen and swab their pigs' noses and mouths with a little filter paper, place that little filter paper in a tiny tube, and mix it with some chemicals that will extract genetic material from their pigs' noses and mouths.
Podem ir ao chiqueiro e recolher esfregaços do nariz e boca dos porcos com papel de filtro, e colocar o papel num tubinho, e misturá-lo com químicos, que extraem o material genético vindo do nariz e boca dos porcos.