Campbell's poor financial performance has caused a rift in the Dorrance family, who collectively control about 58 percent of the company's stock. A dissident faction, representing a 17.4 percent stake, wants to sell its shares because of the the stock's relatively low return. The family stockholders are descendants of John T. Dorrance Sr., a former president at Campbell and and the inventor of condensed soup. Campbell's shares were unchanged at $50.75 yesterday in trading on the New York Stock Exchange.