My family rescued two three day old ducklings from certain culling, but all we can give them for a home is a mobile Quackmobile made out of a large wire dog cage, about 3 feet long, 2 feet wide and about 2 feet high. We move it daily, so they don't stay in the same place long. They are about 8 weeks old now. One duck is clearly larger than the other, and I read that that usually means one is male while the other is female. They are the only two ducks we have, and they live in that small Quackmobile. Thus far, it has not been a problem to house them together, but then again, they are little children right now. When they get older, will it be a problem to have only one female for the male? What can we expect with this arrangement?