I asked my trainer/BO how it was that they literally have NO FLIES, LIKE NOT ONE! She said that basically they use meticulous housekeeping...not one poop shall go un-scooped!
Ha! And upon reflection, it does work! Their barn/stables/surrounding areas are SUPER CLEAN, they do all the stalls and runs twice a day, & also in between if they see a "pile"in one... use fly predators on the manuer pile, not so there are no critters to aid in the breakdown, but to keep then minimal and put them in the outer parts, where the errant flies would be, not the inner, where they need the flies to eat up and break down the poop. It really works!
Plus, when you walk around her property, you NEVER SEE a poop pile! If someone poos while walking around (usually the horses, but you never know-haha!) It gets shoveled up asap. She says it was a pain in the butt at first, being so "anal retentive" (pardon the pun!) about cleaning, but it has very obviously paid off! Just an idea!
"I'm too busy working on my own grass to notice if yours is greener"