A research note predicts a drop in sales during June.Shares of Deckers Outdoor (DECK -5.76%) fell as much as 9.4% on Wednesday after an analyst note from M Science highlighted a slowdown in sales during June. As of 2:30 p.m. ET shares were down 6% on the day.Has the growth train stopped?Data research firm M Science noted that its data showed a deceleration in sales for Hoka and Ugg brands during June. This wouldn't be particularly surprising given the slowdown reported by Nike last quarter and week guidance ...