First off I have so many questions I ordered 2 Cayuga ducklings from Metzer Farms because they are one state from me and I heard they are great. They will be arriving in 1 week and I want to be prepared so I don't have any fatalities! How old will they be when they arrive, guessing 1 week?? Do they need a brooder or a box with a heat lamp? I have starter is that the way to go? I have a female Cayuga should I try to introduce her to the ducklings or wait until they are mature enough to enter the cage with them? Anything else I need to know?? Thank You In Advance For Helping Me!