Hen crushed egg with fully developed chick inside.. survival chances??

[BethDalham]

Hey not sure if I'm in the right forum as most questions seem to be on incubation, but our hen has been sitting on eggs 3 weeks today, I checked on them while she was off eating and one had a large hole around the butt end.. the chick is fully developed, yolk almost entirely absorbed (bit sticky) and seems to be breathing, but she hasn't pipped at all, what should I do with it and what are survival chances??
at the moment she's on a hot water bottle to keep warm, and I've put some damp tissue paper over the hole so the membranes don't dry out too much..
I have an r-com incubator without the plug/adaptor would it work to put that on an aga??
sorry for all the questions, any help much appreciated! xxx

 

[nurse_turtle]

Survival chances are slim to none. Everyone has different experiences and choices they are comfortable with. I would place the chick in a working incubator where temperatures can be monitored. I would check on the chick over the next few hours and if breathing becomes labored, I would euthanize.