Obviously. That mutt wait right on the surface. Not because I dont have enough CHA, but because he's dog meat to super mutant's minigun fire, or rocket, or plasma fire, or gatling lazer, or electricfying force field. Seriously, that mutt's bites are 2-5 damage in case the hit go through. Its' only use is to attract enemies attention and block their way. Mutt is strictly early-middle game only. Keeping it alive is a challenge, no more.