The Greencross Limited(ASX: GXL) share price has fallen a further 6% to $3.92 a day after the integrated pet care company downgraded its earnings guidance. Today’s decline could be attributable to a broker note out of Deutsche Bank. According to the note, its analysts downgraded Greencross to a sell with a $3.70 price target. Although its shares trade on an undemanding earnings multiple, I wouldn’t be a buyer of its shares just yet after yesterday’s dismal update.