I grew up in a beach house on the Olympic Peninsula. My grandmother used to but cracked corn by the sack full 
just to feed the Mallards that like to use or shrubbery as nurseries for their ducklings.
They all became quite tame, faithfully following all those who ventured out into the yard, including the dog and cat
. I used to think it would be fun to have a duck as a pet but, alas, the flock we fed was wild, though attentive.
I’ve recently rethought that:
[youtube=http://www.youtube.com/watch?v=z_nJ2zfajIU]