OK, I have to come clean............. I asked this question after hanging a sock for the first time between 2 posts (high enough that they can go under it) and the first thing one of my calves did was go over and lick it. :frowns: I scolded her and she stopped, but then it made me think about the question I posted.
I am mainly doing the sock as an experiment as I spray my cows once a week or so (Permectrin and water mix) and it seems to have ZERO effect on the fly problem around their bodies. Hopefully, the diesel will make a difference.