CAGNY, the annual conference where leading US food makers face Wall Street analysts, saw the likes of General Mills, ConAgra Foods and Heinz this week reflect on the trading challenges facing the industry. Elsewhere, Pfizer tried to cool fresh speculation around the sale of its baby food business, Kerry Group said it would slow its rate of acquisitions this year and there were rumours a French state fund was in talks to invest in poultry giant Groupe Doux.