My buff duck has been sitting on a nest of about 13 eggs for about a week now, but the weather is supposed to get cold (mid 30's) starting tomorrow night. Should I run a heat lamp out to her in her box? It's been warm,( 80's during the day and 60's at night) and I dont want to risk any of the eggs or her getting sick. Will she be okay without any heat? This is her first time with a nest and eggs so all opinions and suggestions are appreciated!! Thanks!