http://feathersite.com/Poultry/BRKRaisingDucklings.html more info:
another thing is dogs will kill duck and ducklings don't just let your dog be up close and personal with your ducklings until you have taught your dog not to touch or try to play or eat your new ducklings, or...
Here is something to read to get you started...
https://www.backyardchickens.com/search.php?search=Raising+ducklings
please be sure to do your research, and all the best in your new adventure,