A bit of a specialist subject so I'm hoping the right people notice the thread.
Having seen this in a Red Stag it has made me curious. From my reading I see that with the right food supplements it can be treated. So my questions are,
If the herd are treated with the correct supplements will you still get the occasional animal that might still become copper deficient and deteriorate?
Presuming there a point of no return at which a deer with copper deficiency will deteriorate completely how is this avoided?