Guide to Ruminant Parasites
Several years ago, Intervet published a "Guide to Internal Parasites in Ruminants." It depicts color pictures of worm eggs. The guide is available as a PDF file for download.

Teaching the next generation about worms.
Sericea lespedeza has been shown to reduce barber pole worm infections in small ruminants.
Hair sheep tend to be more resistant to gastro-intestinal parasites than wooled sheep or goats.