Visit a working dog training school in Nebraska where dogs learn how to handle sheep and cattle roundups. A Texas program takes feral cats and provides them to farmers and ranchers to help battle rodent problems. U.S. Customs agents use specially trained dogs to discover unwelcome pests coming in from shipments overseas. Barn owls help to keep down pest populations in California vineyards.
Aired: 01/12/18Video has closed captioning.