I have 5 ducks and one drake. Currently 2 of my ducks, a khaki campbell and a black swedish, are broody and overdue. 32 days on the black swedish and 29 on the other. This is my black ducks 2nd unsuccessful run in a row. A float test revealed only 2 floating eggs under the black and 1 bouncing egg under the khaki. The rest sank. I did eggtopsies and they were all rotten. Most still looked yolky with cottage cheese and a few were grey with definate development. Blacks first hatch was the same way, all rotten. They are nesting in secluded, dy corners of the shed they live in at night. I leave them alone as Ive found they break eggs if I mess with them. Am I doing something wrong? Are they bad mommas? Im at a loss here.