The world's second-largest foodmaker went public with its bid for Cadbury earlier this week after being snubbed privately. Kraft's offer – a 31% premium to the chocolate maker's Friday closing price of $37.46 a share, but less than  – "fundamentally undervalues" Cadbury, it said. The offer is less than 15 times Cadbury's 2008 earnings before interest, tax, depreciation and amortization (EBITDA).

"Any follow-up offer by Kraft would likely involve a higher price," Moody's Investor Service senior analyst Brian Weddington said in a note. "The increased leverage that would result under the proposed transaction would be considerable."

Increased leverage could be a boon to Cadbury and its investors, as The Hershey Co. (NYSE: HSY) will likely throw its hat into the bidding ring, one person familiar with the matter told The Wall Street Journal.

"Hershey recognizes that Cadbury is the last major confectionery company potentially available and, as such, is likely to make some response," the person told The Journal. Nestle Chief Executive Officer said his company is always "open to acquisition opportunities if they fit strategically."

Some analysts have Hershey teaming up with rival Nestle SA to make a joint offer for Cadbury and splitting its business, Reuters reported.

If Kraft and Cadbury can reach an agreement, it would be "bad news" for Nestle, Icap PLC analyst Andy Smith told Bloomberg News.