for people who love the littlest dairy goats
Hair loss around the eyes and on the bridge of the nose are often caused by copper deficiency. Crusty sores on his ears could be caused by something completely different.
When you say the buck improved but then flared up again, do you mean all symptoms or only the ears?
Is this what you're seeing in your buck? This buck should be completely black. That's skin you're seeing around his eyes because all of his hair had fallen out.
It's not really a good idea to use injectable dewormers with goats because it stays in their system for a couple of months at a really low level, so that all of the worms in their gut are being exposed to a low level of dewormer, which is basically like giving the worms a vaccine so they can become immune to the dewormer. Pour-on dewormers don't work very well for goats with worms, but they work great for goats with external parasites.
Pour-on ivermectin works for mites and lice.