Barber Pole Worms
Barber pole worms (Haemonchus contortus) suck the blood from their hosts, causing anemia and eventually death. They thrive in high temperatures and high humidity, and are particularly prevalent in the southeastern part of the U.S. Symptoms of a barber pole worm infestation include diarrhea, dehydration, a rough coat, a bedraggled look, blood loss, lethargy, growth delays, problems with coordination and fluid retention.
Coccidiosis
Although all goats are infected with the coccidiosis parasite, younger goats or goats that are stressed are more likely to develop problems from an infestation. Coccidiosis symptoms include scours, weight loss, poor coats, loss of appetite and loose bowel movements that can result in dirty buttocks.
Meningeal or Brain Worm
Meningeal or brain worms (Parelaphostrongylus tenuis) are carried in the lining of the brains of white-tailed deer. Deers secrete the larvae in their manure, which is then eaten by snails and slugs. Goats ingest the parasites when they eat the snails or slugs. Once in the goat, the brain worms migrate from the gastrointestinal tract to the abdomen and then up the spinal cord, where they leave lesions. Although some goats never develop symptoms of a brain worm infestation, others develop temporary lameness, permanent rear limb paralysis or paralysis of all the limbs.
Lice
A common external parasite in goats are lice, which feed on blood and skin. Symptoms of a lice infestation include a dull, matted coat, weight loss, hair loss, reduced milk production, anemia, lethargy and excessive scratching and rubbing.
Nose Bot Fly
Another external parasite, the nose bot fly, attacks a goat's nostrils, resulting in discharge from the nose, extreme shaking of the head, loss of appetite and grinding of the teeth. Larvae from the nose bot fly travel up the nasal passages and feed on mucous and the mucous membranes.