Can Ducks eat Sunflower Seeds with shell?

[Little Byrd]

I'm thinking of making my own duck feed and the recipe I found online calls for sunflower seeds.

http://www.beksbackyard.com/2013/04/how-to-make-your-own-homemade-duck-feed.html?m=1

But it doesn't say whether they need to be hulled or unhulled, just that they need to be partially grinded. Can ducks eat sunflower seeds grinded with shell on? I will be using the black oil kind. Thanks

 

[ChickenGrass]

I'm sure they can eat them with it
But just to be safe I woukd get rid of it

 

[cayugaducklady]

They can eat the hulls. I use them in my homemade food. I soak overnight for the next mornings feed and all day fir that nights feeding.