This post could elicit a lot of guffaws, but here it is. Goats, sheep, deer, etc., all fight with their heads, esp. mountain sheep rams. Has there been any study whether or not these animals have special biological makeup to their heads to be able to absorb these hits w/o concussions? OTOH, I don't suppose you could tell if a goat, sheep, etc., was punch-drunk or not, nor, I suppose, if it's important to know that.