dunno wonna find out myself too.
Tbh i really hope they do...one of the best things for me when collecting the daily defender bonus was a nice little chunk of stardust.
Its such a grindy part of the game..considering you need so much of it...and get just 100 per catch.
and yeah sure you get it for feeding berries...but cmon, 20 stardust ? (just think about the amount of time, walking and berries to earn 3000 dust per day by earning it in intervals of 20)