Muscovy hen and ducklings:
Muscovy ducks can lay as many as 16 eggs, and even the domestic varieties, as this hen clearly is, will hatch their own offspring.
I had a two pet Muscovies as a kid. A very predatory Norwegian elkhound decided to adopt the first one. I never thought of how strange it was for a dog that regularly caught and killed all sorts of small animals to take such responsibility.
If humans can be guilty of extreme anthropomorphism, then dogs can also be guilty of projecting their behavioral characteristics onto other animals. One day the duckling, who had imprinted very strongly on the elkhound, tried to eat out of his bowl. The elkhound snarled as if trying to warn a naughty puppy to shape up. The duckling continued to eat. The elkhound then did what he would have done to any naughty puppy. He firmly mouthed the duckling, but in doing so, he accidentally killed it.
