We took the advice on forum and did the floating test Friday evening, several looked promising even though it was day 29. On Saturday, we began to see some pipping and wrapped eggs in a warm damped papertowel. Out of 5 eggs we have 2 healthy babies. The others, 1 appeared to be all wrapped up and just couldn't make it, the others are very weak. They are alive but still in the "exhausted" mode as if they just broke out. When I look thru picture window with flashlight it appears there is a difference in the egg shell area. Where the others was a gooey dried looking substance, these have very yellow almost yolk looking blob with veins. My first instinct was that it looked like something that should be inside the duck rather than outside. It appears to be coming from the rear area but hard to tell. I do not expect them to make it but would be interested if anyone else has had this same issue and what may have been the cause.