After 30 years of breeding calves and following a bad Pinkeye season 2019 Spring calving, decided to give this a go whilst tossing up whether to vacc calves next calving with Piligard.
Pretty impressed. Only small mob of 32 calves ( Sept/Oct drop) but so far not 1 case of Pinkeye. Not a fly in sight near any calves the whole time. Applied 5mls at first vacc and marking, 5weeks later another 10mls at second vacc, then 6 weeks later another 10-15mls depending on calf size. The chamber marking is no good ( hopeless) for older eyes so had to use a black marker to be able to see the 5,10,15 ml lines. Also it requires a VERY light touch to only fill the chamber with a small amount. LOL , if you want 5 mls then barely touch the bottle, whatever you do DON'T squeeze the bottle !! Once you get used to that it's not a problem. I figure that by the time you apply it 3 times the cost is only about 10c less than the Piligard vacc so may or may not use it next time. Does it work as an effective fly deterrent - ABSOLUTELY.
This stuff is amazing. Somehow my 2 oldie horses were itching like mad. I finally worked out they had lice. I dusted them and are half of the product in the process it did nothing. Purchased coppers app l off it and in 24 hours different hiorses