I have an 8 month old Buff duck mom currently sitting on four viable eggs either hers or the Khaki Campbell's. I'm trying to let her raise the ducklings on her own (no brooder). I'm worried with the cooler weather that we're having here in south Mississippi as to whether or not I need to provide any heat for the ducklings or will Mama duck to the job. Her best is in a dog house with shavings. Will they be warm enough?