So much misinformation it's scary. For gapeworms you need Valbazen (albendazole) or Safeguard (Fenbendazole) horse wormer paste. A couple pea-sized drops in their mouth for 4-5 lb chickens. I use 3-4 pea-sized drops for large fowl chickens. Then repeat in 10 days to get the new ones that hatched from the worm eggs. It wouldn't hurt to repeat 10 days after that also. The vet diagnosed it and he told you to use DE???? An actual VET told you that? Ivomec won't kill gapeworms (but I'm through debating that). DE certainly will NOT either.
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