Hi. My name is amber. About a week ago I got pekin ducks from tractor supply. They had very little info on them. I am new to ducks and need all the advice I can get.. What advice I need now is about how old they are and if it is ok to shut the heat lamp off at night. They are kept in the house It's pretty warm.. They never seem to want to lay under it either. They always huddle to the water bowl on the other side of the box.. I have moved the light up almost 3ft from the tip of the box. Can I start to eliminate it? Please help..