We have to go on an egg hunt to find our duck's eggs. She won't lay them in the nest box. I found two today in the mud and one two days ago. I wonder if there is more hiding in my yard. My question is does the water test really work? If the egg sinks it is good, right? If it does really work, why do the bad eggs float? A second question is if a chicken lays an egg and it cracks the shell but leaves the membrane intact can you still eat the egg? And since I am on the egg laying subject, how do you convince a runner duck and a cochin that the best place to lay eggs is IN the nest boxes and not in the mud or rocks. Thanks.