My muscovy female has been sitting on a nest for 38 days. For the last 5 or 6 days she has been not sitting on the nest during the day, only at night. During those 5-6 days it was high 90 degrees but one day it was only high 80's. I candled a couple of the eggs and there doesnt appear to be any movement and there is no internal pip. Is it possible that the ducklings are still alive?