I pick my paddocks (dirt dry lots) almost daily. I pick the mare's daily, as it is only 24x24. The colt's paddock is quite a bit larger and he doesn't poop as much nor as big as the mare (yet) so I do his every day to every other. I harrow the pasture. I prefer to pick the paddocks rather than harrow them because it removes the poop almost entirely, which means when it rains, it's more mud than manure slop.

I also use fly traps and use premise spray to keep the flies to a minimum.