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 I'd like to hear from a vet or two on when the best 
times to purge with ivermectin are.  My horses are on Strongid C 2x, and 
I've notices bot flies buzzing around them lately.  Aside from scraping the 
eggs off, when is the most effective time to purge with ivermectin to kill the 
bot fly maggots? 
Debbie Ager 
  
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