The ULTIMATE list of DUCK Treats and Supplements...
Good for summer....I'd have to put a water heater in for winter....
Watermelon - a great way to cool down your back yard chickens (and ducks!) on a hot day!
2 Strap Style Walking Harness for pet Ducks, Chickens, and Geese by PartyFowl on Etsy
Need to do this to my duck pool. http://www.backyardchickens.com/forum/uploads/47297_img_4304.jpg
how to care for ducks in winter
easy-peasy chicken coop from playhouse & pallets
Sand bag fish pond - looks very nice. Can you swim in it too? This whole website looks like it has a lot of good info.
Duck Pond & Shower
Duck Pond Filter & Shower with lots of pictures. (For 'guard geese' alarm system)