They also catch mice and swallow them whole. Jurassic Park style.
My mother's chickens once caught a snake, stampeded it to death and then promptly ate it. Dinosaurs for sure.
I can confirm at least that on warm water they float as ducks, and seem to enjoy the experience greatly. I was too soaked to appreciate the swimming style.
Hum, thinking about it, this is a great meme waiting to happen. All that you need is a warm Olympic swimming pool, to borrow some fatty velociclucktors and the cover of the night. Worldwide fame, here I go again...