I am also trying to rehome 4 ducks! They are all 7 weeks old. 2 are welsh harlequin (males I think) and the other two are welsh harlequin x blue Swedish mixes. they are very pretty but I sadly don't have enough space for them. If you would like them PM me.
Do you have a thermometer under the heat lamp? Are all the chicks crowding under it or on the other side of the box? Have they drank and water and/or ate any food?
Short version: A raised waterer helps tremendously!
Long version: When I go my first batch of chicks almost 2 years ago I had one of those plastic waterers which work fine but it kept getting super messy on the ground. I has to change their water multiple times a day and it was a huge hassle...
Great! Just made a paludarium (fish tank with land and water) and added fish and snails. I am adding more animals like a turtle, a gecko, shrimp and more soon! How have you been?