How old are they? and do you know if the pond has snapping turtles? and have you been taking the ducklings out and letting the adults meet them gradually?
I'd give them another week then set up a small area with some kind of fencing they can't get through and on a nice warm day take them out and let the flock meet them through the fence. Keep doing this till ducklings are 4-5 weeks old by then they will all know each other and ducklings will be big enough and old enough to be with the adults. Be sure when you take them outside they have shade to get out of the hot sun and plenty of cool water and feed while outside. Have you posted pics yet? we'd love to see them.
They are so adorable.How many ?
Here is a few pics of them all!
I haven't seen one but I have read of it happening, Keep deep bowls out for water and feed so he can scoop. Can you post a pic? What are you going to do with 47 ducklings? You must live on a lake.
Hens go broody when you don’t want them to… and won’t go broody when you do. 
