@Debby Duck now seeing your set up i can tell you why they are not going to the pond your water station is the reason they have the water they need right there so no need to go to the pond second your floor needs to be solid the wire will give them feet issue's and if you are going to rehome...
Oh
Oh i didn't realize you were in Florida ya then you will either have to re-home or get more girls or swap girls for boys if you can find someone to swap with if you don't mind my asking how big is your setup for them
One why not keep them and just separate them or get more girls for your boys
2 around 20wks they come into season for breeding and egg laying but since it will be winter by the time they come into season you probably won't have to worry till spring if it were me i would get more ducks so your...