My name is Melissa and live in Wisconsin. I have 6 duck eggs in an incubator. The mom was attacked and the rest of the babies were eaten. I have no idea what I'm looking at when candling. They should be hatching next week I think....not sure how long mom was on the nest first. Can I put a washcloth at the bottom of the incubator prior to them hatching? What are some signs that they should be put in lockdown?