Can you add ducks to a pond with a flock of wild ones?

[sunny & the 5 egg layers]

A family member lives on a pond and has just recently acquired a new flock of wild ducks. They feed the ducks everyday. She wants to add two white ducks to her pond.
Is this an okay thing to do? Will the ducks have to be cared for, or will they find everything they need on their own? How about in the winter?

I'm not much of a duck person, so I figured you guys could help answer these questions.

Thanks in advance.

 

[Jimmyjaffee]

Yes, they will have to be cared for. Most waterfowl have lost there ability to live in the wild and generations of selected breeding has made most ducks very vulnerable to predators. Many ducks popular in the hobby can not even fly. I've heard of some stories of ducks adapting into the wild, but most of the time the ducks will rely on you to feed them and provide them a safe shelter at night, especially during the winter. Most pet ducks will not fly south for the winter and would not survive on there own.