I've pulled kids off my does for various reasons a million times and never had one attack me. One or two have tried when I needed to intervene immediately after kidding, but that is totally different situation from what you're describing. If she is that protective of a 5 month old kid, she will be a holy terror right after she kids again.I forgot that I also took her 5month old kid for a walk before I trimmed other goat. Which I do often