I'm not convinced that a measly 30 cc's (or whatever paltry amount it was) is enough to do the job. DeLice was 5 oz. and you could put some on the middle of the back and on each side. Oily crap, tho, and made a mess on ME for about a week. But...........we had no flies. And we also had the barn sprayed once a month for flies, so milking during fly season was usually pretty decent.
