ducks would have starved to death.
I had a cat raise to chihuahua puppies for me once. All the vet told me the pups would die. The milk wasn't good enough for pups. Wrong!!!! the puppies thrived as good as the 5 manx kittens she had. The funny thing is at the time it was time for the kittens and puppies to go to their new homes . The cat didn't even look for the kittens. But she hunted high and low for the chihuahua pups. In peoples coat everywhere.
I think it was because the kitten didn't mind very well as they got older, they were getting way to indented. The puppies on the other hand followed her around, and if they were playing and she called them, they came just running to her with kisses and hugs.
The great difference between puppies and kittens. and a mothers love. It was great to watch...
It totally amazed me ducks would be that smart to suckle on the cat. The bond doesn't surprise me.....