Alder Burns wrote:Just a stray memory but it may be useful. Years ago having nowhere else to put them, we put a bunch of turkeys in the same pasture as our dairy cow. The birds learned soon to follow the cow around and scratch up the manure for bugs and uneaten grain. Then they began picking the flies off the cow. Eventually the cow learned to lie down and the turkeys would walk all over her, catching the horseflies! I never got the chance to work with this observation since....but I wonder if other poultry might work as well or better?
Unfortunately our dogs won't let a bird live in here for long

That is why the egrets aren't doing the job!
Neem is a great idea and I already have a bunch of oil that we use for de-flea and de-ticking dogs. The oil used straight on the cow is a little thick though and means they will get TONS of dirt and poo stuck in their hair. Maybe if I mix the oil with water and spray it on the cows and on the ground? I don't actually have neem trees to use the leaves (we are at a higher elevation) so I have to either dry it in Delhi and bring it or just use the oil.
Thanks y'all!