Day 23 no signs of piping/hatching. Hen let eggs go cold. Will they hatch?

[RhiannonHendo]

So we have done duck eggs in an incubator before and all was well. One of our chickens went broody so we put some fertile eggs under her. Today is day 23, she has been amazing at sitting on her nest, only leaving to go toilet. We have kept food and water in front of her/in her reach.
The eggs were candles last on day 16 and were developing on track (12). On day 23 there are no signs of piping and I caught mum off the nest this morning, eggs were very very cold to touch. I think she is giving up on them, I have encouraged her back on the nest and she is sitting on them now.
Would them going cold have killed the chicks inside? I feel so sad thinking about chicks just about to hatch dying.
Is there any hope for them hatching?
So I leave them with mum or bring them into the incubator. I’m not a fan of touching eggs at all after 18days.

so ultimately my question is, could they still be alive? Or are they gone after going cold?
Do I leave them with mum, even tho she showed signs of abandoning the nest? Bring them inside and move them carefully?
Also what are the chances of them hatching? Day 23.

 

[Not-so-tough Farmer Mama]

I would candle them, and if there are signs of movement, bring them to your incubator. I'm sorry I'm worried they may not make it through the cold.

 

[RhiannonHendo]

I brought them into the incubator later that day (day 23) we had one pip last night and is fully hatched this morning (day25)
We have another chick that’s trying to batch breech, it made a pip and some blood came out. I haven’t touched it, any advice?
No other eggs have piped. I’m thinking they are delayed from being cold. What’s your thoughts?

 

[Not-so-tough Farmer Mama]

I brought them into the incubator later that day (day 23) we had one pip last night and is fully hatched this morning (day25)
We have another chick that’s trying to batch breech, it made a pip and some blood came out. I haven’t touched it, any advice?
No other eggs have piped. I’m thinking they are delayed from being cold. What’s your thoughts?

I'm so glad they didn't die! Different people have different views on assisted hatching. I've assisted under strange circumstances, and this definitely qualifies as such. If no change happens after 6-8 hours and you feel up to it, you might consider assisting the breach one. At this point, it wouldn't hurt to candle the remaining eggs to check for movement. That way you will know what you are working with.