This is pretty interesting, Fonterra just weighed in on the discussion...
"In separate submissions to the Australian Competition Tribunal, New Zealand's Fonterra and the Italian-owned Parmalat Australia have described aspects of Murray Goulburn's public interest argument as "highly speculative" and warned that some of its claims needed to be viewed "sceptically". http://www.businessspectator.com.au/news/2014/1/9/mergers-acquisitions/wcb-merger-claims-disputed
Seeing as they own a sizeable chunk of Bega, this could be viewed that they would not favour Bega giving their WCB-shares to Murray Goulburn.
WCB Price at posting:
$9.14 Sentiment: Sell Disclosure: Not Held