i HAVE BEEN USING 3 FULL DROPPERS OF PURE OREGANO TO 1 QUART OF WATER IN A LARGE SPRAY BOTTLE.....SOAKING THE FUR OF DOGS AND CATS, GOAT, ETC......AND IF THEY HAVE FLEAS. THE FLEAS COME UP AND OFF IN SECONDS AND THE ANIMALS SEEM TO NOT BE BOTHERED BY THE OREGANO OIL AT ALL......THAT SEEMS TO BE A GREAT METHOD FROM WHAT I HAVE SEEN.