I have a debate going on about incubation. My ducks have been laying eggs for several weeks now. They are a mix buff orphington and muscovy. They lay all over the yard instead of in the coop I built for them, except one started laying in the hay of a lean two I built for them. I have 4 buffs laying and a female muscovy. I had thought the one laying the nest was my muscovy female, but had never seen them set. I gathered the other eggs and left the nest alone. For 17 days I had been hoping to see the scovy start setting, but did not. I kept counting the eggs and it kept increasing up until 20 eggs were in the nest( I had added 3 that had been strewn on the yard to the nest.) Friday, found it was one of the buffs sitting, It had become cold that night (has been in the 70s for last few weeks with temps in the 50-60s at night) when temps came up to the 60s again she got off the nest. I put more hay by the nest and she covered her eggs with the hay. THe eggs are being turned to as they are moved. I have never incubated before, but was given a wooden incubator that I just had to fix as the heating element had been broken when it got caught in the auto turner when bolts had evidently become loose. I reattached the heating element and tightened the bolts and the turner is tracking well now. It is now holding temps between 99.5-100F and the thermometer in the water pan is reading 86 after running 12 hours. My question is since buffs aren't supposed to be good brooders, should I leave them out there and see what happens or try to incubate them, age of eggs will vary as they basically run from 2day old to almost 3 weeks old.