Ducks love worms! Whenever they see the shovel in my hand, they come waddling at top speed. Please note, however, that I am over-cautious with the shovel around them. I do not allow anyone else to dig worms for them, even if another person asks me, because I know the ducks' body language and how to read what they will do next and I am extremely careful with the shovel. They can get seriously injured in a second.