Slippage began to appear in the soaring Ducks' game even as their winning streak reached four games. And Friday night, a slipshod first period finished them off ... and their streak. Trevor Daley and Jamie Benn turned two penalties by the Ducks' Brad Staubitz into power-play goals and the Dallas Stars used a 20-save effort by goalie Kari Lehtonen to score a 3-1 victory at American Airlines Center. The Ducks (7-2-1) lost for the first time since Jan. 29 at San Jose. Goalie Jonas Hiller made his first start in three games but lasted only one period as he suffered a lower-body injury and was relieved by Viktor Fasth to start the second. Ducks coach Bruce Boudreau said he believes Hiller isn't seriously hurt. What pained him more was seven minutes of penalties from Staubitz for retaliating against what they felt was a spear by Stars defenseman Stephane Robidas on Corey Perry. Staubitz was the only one penalized for roughing during a scrum and then got a five-minute major and game misconduct later for spearing Dallas rookie Brenden Dillon. Daley and Benn each cashed in. "It wasn't a penalty," Boudreau said. "What do you want me to say? Good refs have bad games. Like good hockey players have bad games, good refs have bad games."