I dont get the 'price war' on milk etc.
What I suspect is the said companies (refuse to name them) are just doing it to gain unpaid media coverage (aka no cost advertising in prime time) as current affair shows bleat out the fact that some company is unleashing cheap milk.
IMO It really is a just a marketing ploy where they get their company sprawled over the TV screen for several minutes rather than pay a fortune for 30sec advertising time slot.
Makes me go to another store and pay the price. So what for saving a $1 or whatever.
These companies understand that Current Affairs programs are desperate and will settle for crappy mud raking 'news' items.