Adds details on results, background, shares in paragraphs 2, 3, 4 and 6 May 8 (Reuters) - Tyson Foods Inc TSN.N trimmed its full-year revenue forecast on Monday, in a sign that price hikes and stubbornly high inflation are discouraging consumers from spending on its products. Shares of the Jimmy Dean sausages maker fell 5% in premarket trading, as the company also missed second-quarter revenue estimates. That, coupled with mounting recessionary fears in the United States, has forced budget-conscious consumers to opt for more affordable and cheaper alternatives over pricier meat.