rope worms, Funis vermis, one of the associated parasites yielded by the "Larva" that possesses these endosymbiots within it's liquid filled body. You need Fenebendazole 10% by Safeguard, Jeffers online or any tack supply house for horses or any local feed and seed. one 25gm tube per one week period taken daily and 1sixth of a tube 4gms daily for 4mths, one week on and one week off takes longer but stress can be an issue with high parasitic loads, enemas made with eucalyptus essential and 2qts of tea made from the leaves of eucalyptus. Hold in by squeezing butt cheeks together, when one feels the oil in their throat its ok to dump the ensuing mess. Lastly, enemas made with the juice from six lemons, also use the oil squeezed from the rhind of the lemon, essential oils are inside it. same amt of liquid 2qts.