I agree. CAE can show up after you've had negative results. There are a lot of factors that can increase/decrease risks. The best thing to do is know about what it is, and take precautions that you are comfortable with. (like pulling babies from mom's you know have it or if you don't know, not taking the risk and pulling them)
I personally feel like Lifesong does. It's something to know about, but it's also not a reason to euthanize if the goat isn't suffering.
Also agree that Fiasco has good information. Probably one of the most information complete places you can find on line. She doesn't have the same kind of goats that I do, so some of her information has to be tweaked for my use. IMO, you should also take into consideration the differences between why YOU have goats and why she does. However it's very easy to do that, and take the information that applies to you from her site. I really like the way it's set up.