As a kid, I lived next to a manmade lake with ducks in it.
People walked their dogs next to it alot, and didn't pick up the poop.
Our form of amusement was kicking dog crap into the water, and watching the ducks eat it. They usually swam up to you expecting food when they saw humans on the banks.
Ducks suck. I have more respect for a dog licking its own ass.
At least they know what they are doing/tasting.