The Collaborative International Dictionary of English v.0.48:

Swineherd \Swine"herd`\, n.
   A keeper of swine.
   [1913 Webster]

WordNet (r) 3.0 (2006):

swineherd
    n 1: a herder or swine [syn: swineherd, pigman]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "swineherd":
   cattleman, cowboy, cowgirl, cowhand, cowherd, cowman, cowpuncher,
   drover, gaucho, goatherd, gooseboy, gooseherd, herder, herdsman,
   hogherd, horse wrangler, horseherd, pigman, puncher, sheepherder,
   sheepman, shepherd, shepherdess, swanherd, vaquero, waddy,
   wrangler