You haven't lived until you've witnessed a pair of ducks playing with a giant slug in a bucket of water, so it releases masses of protective slime which glues their bills shut and they try and wash it off in the water but it is too sticky, and they want to eat the slug but its too much fun playing with it first, so they have to wipe their bills clean on the grass first, and then eventually one of them downs the slug in one, like it said out of a shotglass down their throat!! lol
Chickens will just peck the big ones into pieces first. The tiny ones go straight down. Gross but apparently yum.