The copper oxide "needles" (yikes!) what size are those little pieces of copper? Has anyone split the cow bolus before and seen the size of the actual pieces? What could you compare them to? And why is Copasure so expensive when house wire is made of copper oxide...isn't it? Anyway copper oxide is used because it isn't absorbed well by the goat. Copper sulfate is sometimes used because it is absorbed well by the goat. I just have a lot of questions about this. Are we giving one or the other because everyone does it? I've read the studies but can't see that oxide is better than sulfate. Liz, did you have trouble with the copper? I thought I'd read you had some pretty bad trouble but maybe I'm not remembering correctly. Any insight would be helpful.