Carol , is doing a great job providing a positive living environment for the rescues for all the water fowl that has been abandoned or need a home.
I have also rescued many ducks, and have learned what their best needs are for shelter health and well being. Clean water which is used for bathing and drinking , finding insects or vegetation to consume. Water fowl are very smart and have a terrific memory and learn very quickly.
Housing for the birds needs to provide enough space as each bird is territorial. Their needs to be plantings for shade,greens like dandelions for consumption as well as soft earth to investigate ,find and consume worms etc.