That is exactly why I advised OP to talk to a local expert/experienced person. It's very unlikely anyone on this forum knows what their area is like so we can't give localized advice. Taking a week or so to ask a local isn't going to kill a goat unless it's showing more extreme symptoms. Before I asked my vet I didn't know about the dangers because when I looked online about info not a single forum post or article talked about toxicity. It's a really good thing I asked my vet first.@Iomine, you live in copper mine country. That's a very, very unique thing.
Copper deficiency kills a LOT of goats. Did you know that low copper levels in the mother through pregnancy will kill the goat kids? Not right away, they die long, agonizing deaths at a few months old. The mother will die during the next pregnancy when the next kid robs her body (again) of every last bit of copper, unless she's been treated. It's called "In utero copper deficiency", look it up.
When we talk about dangers to goats, yes, we talk about the most common ones. We don't give advice based on rare or unique circumstances. And location matters. Like, on this forum, even though we have members based all over the world, MOST of us are in the US, so if you ask about predators, the advice given to you will be based on canids. even though a major predator of domestic goats is Lions in over 20 countries. But things like lions and unusually high copper levels in the soil tend to be dangers that people in those areas are very aware of. For example, I'm sure that most of the copper related deaths that a vet in Peyton, CO would have seen would be sheep related, and it would be known to not raise sheep around there, as sheep are killed at 1/4 of the amount of copper that a goat needs just to be healthy, and if even one goat has died because copper levels in the soil are high enough that a bolus tips them over the edge, sheep in that area must drop like flies.