[QUOTE=Takeshi;5445734

DUCKs! They can be good pet too and can be very friendly, and supposedly they sleep with one eye opened, because of the instinct to protect oneself from predators, or as one pet duck owner puts it, she never catch them sleeping.
![/QUOTE]

Ducks are great pets! I've seen mine sleep, though. It's cute. Especially the sleeping babies.