hi..i'm a new duckling and chick owner..i was wondering just how long do i need to keep ducklings in the brooder with a heat lamp?..they are 5 days old now....also...when can i let them swim in a little bit of water?...i have them and my chicks together right now..and it is getting a bit messy with them all together..i want to put the ducks in a rubbermaid tub..but i dont want them to get chilled..so..any help will be greatly appreciated..thanks.