I just purchased two duckling this morning and really don't know much about raising them. I'm not sure how old they are but I would guess them to be no more than three weeks old at the very oldest. They are kept inside a house that stays at about 75 degrees or hotter, day or night, but they start moving and making more noise when I turn all the lights off. From what I've read, I figured that a heat lamp with this kind of room temperature would be entirely to hot. I'm just wondering if maybe they need a night light?