BOT flies - deworm again?

Laura and Ero

I dewormed using ECIR protocol this April (ivermectin, double-dose Strongid). Yesterday I found BOT flies on my horse's legs. I removed by hand, but wondering if I should deworm again and if so with what product? 

Vet happens to be out shortly (for another horse), but would it be worthwhile to have a fecal sample done? 

Laura and Ero

October 2020 | Erin, WI USA 

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