The seedling mat solution only worked until -12c FWIW.... The only way I'd anything about the freezing eggs is if they are splitting... That seems to happen to me well below -12 anyhow.
Oh my gosh, it would take a novel to chronicle the ups and downs we've had with him. Friday night I was almost ready to give up. His feet were very swollen, dark, and had huge greenish/blue areas on them. They drained this yucky stuff out of the holes. He walked on his hocks, sticking his feet straight out in front of him and doing a sort of crawl,swimming motion to get around. But he was eating, drinking, pooping, cheeping,and going in and out of his cave. He just wouldn't bear any weight on them directly.
Then Saturday morning I woke up to frantic cheeping - I came out to find that he'd gotten himself in trouble again! He'd gotten up on top of his tunnel and couldn't get down. So I did his hot tub treatment, rubbed his legs and feet down with more castor oil, and then we had to go to Billings. We were gone about 6 hours. Returned to him demanding - demanding - that he needed fresh water. I use a nipple waterer in his little suite and although he was using it quite easily in the coop he couldn't do it himself in his brooder....because he was always sitting on his hocks with his feet stuck out in front of him he couldn't lean forward and trip the mechanism to get water into the little cup. I was poking it for him and he drank what came out. I liked it because I knew he was staying hydrated since I was helping him. When we went to Billings I put another candle lid in there with water and dipped his little beak in it so he'd know it was there. It was the flatter kind of lid rather than the domed one like his hot tub and very shallow, so I didn't have worry about him drowning. Well, the little stinker must have had a party while we were gone. The paper toweling in his coop was covered in little wet footprints. Yep, footprints! He must have thought I put his hot tub in there for him and used his drinking water to stand and soothe his feet. He's now standing on his feet instead of on his hocks. His feet look far less swollen and less dark, and he's bearing weight on them.
This was the frostbite blistering on the first day. He had these on both feet. I opened and drained them but they'd fill back up.
First hot tub treatment - he suspended his body on the plastic seal of the lid and dangled his feet in the water. He also protested loudly when he was taken out!
You can see that he sat on his hocks with his feet stuck straight out all of the time, even while moving around. His feet are very dark and swollen in this picture - it's not just the shadow in the picture.
Last night's hot tub treatment - he's STANDING in the water with his legs and feet in proper positioning for the first time!
The swelling is way down, the color is better, and he's using them now.....I think he'll lose some tissue but I'm more optimistic than I was, and very glad that I didn't put him down on Friday when he looked so bad..
Sorry for the hijack.....I'm just so tickled with his progress.