Bing's page today is all about Mountain Goats. Naturally, I thought of their use in Skyrim. They might even make good mounts if Skyrim's version is large enough.
Could be like FO:NV Bighorns, leave them in peace, most of the time they leave you alone, but get too close, you better hope when that headbutt connects that Skyrim sees the return of the Slowfall spell.