Actually, there is only one musher doing this for a Dodge pickup.  That's Dallas Seavey, because he will easily win again this year.  As far as abuse, these temperatures make for old musher abuse more than dog abuse.  Remember the last race out of Fairbanks, Dee Dee, Lance and others got bad frostbite on their hands.  The race was moved to Fairbanks because of the old mushers.  Gray hair mushers would have broken bones going over the Alaska Range this year.  The geezers that run the Iditarod, like Mark Norman, look out for their geezer musher friends.  #NotMyIditarod