Kraft Food's largest shareholder, billionaire investor Warren Buffett, has come out against the US group's takeover of UK chocolate-maker Cadbury. "I've got a lot of doubts about the deal," Mr Buffett told US television station CNBC. "If I had the chance to vote on this, I'd vote no." Mr Buffett's comments come a day after Kraft announced that it had agreed to buy Cadbury for £11.5bn ($19bn). Despite his opposition, Kraft does not need the backing of its shareholders. Mr Buffett owns his 9.4% stake in Kraft through his Berkshire Hathaway investment group. Before the Cadbury deal was agreed he had urged Kraft not to overpay for the UK firm. He also said he questioned Kraft's decision to sell its North American pizza business for $3.7bn earlier this month to help raise the funds to pay for the Cadbury deal. "I feel poorer," said Mr Buffett.