My incubator eggs are on the verge of 5 days until hatch. I was standing by the incubator tending to my 2 IR ducklings when I heard a "wobble" from the eggs in the incubator. But, I didn't *see* it, only *heard* it. So, it got me thinking: when do ducks eggs "wobble"? Or, am I just imagining things? The incubator is programmed for lock down in the next couple of days, so this is my final chance to candle or anything else! But, I don't want to even candle/intefere if it may cause a problem at this stage! Can they wobble 6/5 days before hatch?