I have six duck eggs in my incubator. All was going well with movements and heartbeats. Over the last few days the movement has got slower but today disaster struck. My toddler got into the incubator and fiddled with the temp. When I went back to the eggs they were baking at 50degrees. I am unsure how long they were like this for but I can't see any movement in the eggs. My question is are they able to survive this temp or is it probable that they have died. Please help.