Since she hatched them it's much easier. make sure that nothing is too deep to get trapped in and that they have enough room. She will provide oil so the ducklings will be water proofed and she should teach them how to eat. They are so cute! She is so pretty too.
Hmm, I personally would turn on the lights but they seem to be doing alright. If I saw mine like that all the time then I would think they were cool but We don't know the temp and the ducks in the small container seemed quite fine away from the heater for the sick ducky. So the ambient temp...