Struggling Weight Watchers has trimmed its agency roster of Weiden + Kennedy (advertising) and Ketchum (PR).

MCann-Erickson held the account for several years before the switch to W+K last year.

WW released dour financial results for the quarter ended Jan. 3, sending its share price into a tailspin as membership dues and active subscribers dropped 10% and 15%, respectively. North American president Lesya Lysyj has also exited a year after joining from Heinekein.

Some analysts believe the WW business model has been disrupted by apps and wearable technology that track calories and exercise and render WW meetings and reporting unnecessary.

Senior VP of marketing Maurice Herrera told Ad Age the company is taking "a number of actions to change our marketing execution moving forward."