Vitacost.com, Inc. (NASDAQ: VITC) is getting hammered and may be the worst performer out there today after it lowered guidance. The stock has been downgraded everywhere: Jefferies, Benchmark, Needham, and at Roth. This one has been public for less than a year, so as they tell a rookie pitcher after he gets drummed in his first game as they send him to the showers, “Welcome to the majors kid!”…. At 8:52 AM EST the stock is down 31% at $8.68 on 207,000 shares. That has already passed its average daily volume with more than 30 minutes to open.