Originally Posted by kitten_Val
I honestly tried it for 2 or 3 weeks. The number of flies didn't decrease.
So I gave up and went with the fly spray...
If you were giving it to them through feed, it takes more than a few weeks to get all the way into their system. Next time, give it 2 or 3 months before you give up. =]
So it is okay for horses to eat/drink it? I wouldn't have the slightest idea how much to give though, it seems everyone gives a different amount. Also, my horses only get grain at night, so I'd like to keep it once daily. O_O