On several occasions my friend has offered me swans. She has a pair of black swans, and has recently offered me two of the babies. i am intrigued, but unsure of how to care for them. i guess the biggest issue is a pond. We use kiddie pools for our ducks, but i would assume swans would need an actual pond? If so, how big would it need to be for two swans? Do they need to be locked up at night in a pen? What do you feed them? i'm thinking if i start planning now, perhaps we could be ready next year to add some to our family. Thank you in advance for any advice.