Theeggswere neverthawedout from the first time they werefrozen. I checked all theeggstosee which ones werefrozen, separated those out, and immediately put them in the freezer to deal with them later.
Discover essential tips in our first blog post on caring forchicksfromheritagehatchingeggs. Learn about brooding,feeding, and health for strong, pasture-raisedchicks.

Learn how to preventfrozeneggsduring winter and keep your flock'seggproduction steady. Get tips on gatheringeggs, using heat sources andfeedingfrozeneggsback to your chickens.

The Livestock Conservancy www.livestockconservancy.org Feed requirements:Heritagebreeds of chicken (especially heavy or dual purpose breeds) require a more nutritionally complete feed ration than their commercial counterparts, in order to fully achieve their potential size and productivity. Many of the common rations found in feed stores are formulated for commercial hybrid birds which are ...

Myeggshave beenfrozenwhen I collect them from my girls. I wondered if they would hatch after beingfrozen, and thenthawed. I know they werefrozenespecially with temps of -25 to -30 below. So far I have 6 little fuzzy butts from them. All seem to be fine, and running around in the brooder.
With those temperatures ( around 0) I expect you would havefrozeneggsduring the day if no one collects them all day. I would collect them,frozenor not. The ones that only hairline, I'd wash quickly and let thaw in a container and then crack and use them asap. The more-than-hairline cracks I would thaw and cook to feed back to them.