A huge thank-you to reader (Another) Julie who suggested turning one of my own favorite treats into a delivery method for our goat's bolus. (Okay, my recipe has cocoa in it and differs a bit in other areas too, but still....)
For the goat version, I
mixed peanut butter, molasses, and oats in the right proportions to get a
rollable ball. Then I split the bolus contents into three of these
"cookies," keeping the balls small enough to be goat-swallowable but big
enough to completely engulf the copper rods.
Artemesia gladly scarfed
down the first one, willingly ate the second after clearing her throat
with some alfalfa pellets, and will hopefully eat the last one today. Based on this website's goat x-rays, it sounds like the in-food feeding of copper rods should be just as effective as the scary bolus-gun method. Fingers crossed this will help nip our parasite problem in the bud!
But it could be plated with another metal to prevent oxidation.
Or it could be a copper oxide like CuO (cupric oxide), but that isn't supposed to be absorbed well.
Copper and its alloys are pretty strong biocides, so no wonder parasites don't like it. I've read that a brass or copper door handle will kill 99.9% of bacteria on in in a couple of hours.