If this year's hatch, Muscovies may not start to lay until next spring. At least, that's what all mine do. Muscovies do NOT steadily lay like egg laying breeds... You won't find an egg a day. A muscovy will only lay when they want to start building a nest. You'll begin to see the hen leaving with the drake on individual 'dates'... soon after, you'll find an egg in the corner of the coop. If you want, you can move the first eggs to a better part of the coop and make a nest - she's more likely to lay in one spot or a 'good' spot that way. She won't build the nest until a couple days before she starts to set the nest - usually pulling breast feathers for additional fluff a day or so before incubation.
If the ducks are laying in a good, dry, safe place, let them set. I've never had any luck at all trying to artificially hatch muscovies. However, with muscovies expect a VERY high hatch out, LOL!
