I read so many threads that never have a post on what happened in the end, so here is "the rest of the story".
I continued feeding "Moira" by hand. I also changed his food and water bowls to yogurt lids glued to a thin piece of wood (to keep them from tipping), and put piles of crumble around his pen, as was suggested. Both of these changes helped a lot and he was able to get some on his own.
I got down to feeding him 4 times a day. I would do two feedings on my lap, and 2 where I would put him in the sling and he could feed himself from the food and water I'd place right in front of him.
I continued to take him outside daily to see mom and sister. Eventually, mom started to be mean to him, so we changed to just going out with sister. They were adorable together. They would share scratch, cuddle, and quite often when she would start screaming for mom, he would sing to her. It was SO cute!
For 4 weeks the only bit of improvement that I saw was that he stopped the head/body lurching. That was all. No attempt to stand at all.
He was very bright-eyed and would sing a lot in the house. I weighed him every 2 days and he continued to gain weight. I had a crumpled up towel in his pen that he would go under to sleep. There was also a small, stuffed cat that he would constantly snuggle up to. He didn't seem "unhappy", but I knew that we could not go on like this forever. It was not fair to either one of us.
So on Friday of Labor Day weekend I decided that when the vet office opened up again on Tuesday, I would make the appointment to have him put down.
Well, lo and behold, Saturday night while I was eating dinner, he decided he was done just lying around! For 3 hours he basically just raced around his pen. He kept trying to get up, move a little bit, and then crash down face first. Four weeks of NOTHING, and then, BAM!, he goes crazy!
The next 2 days he didn't try to walk again, but he was actually sitting upright with his legs underneath him. I thought maybe he was just tired or sore from his big night, so I decided to just be patient.
On Tuesday he started getting up again, and now he wasn't being crazy about it. His toes on both feet were curled, so after doing some research on BYC, I thought it couldn't hurt to try using medical tape to try to flatten them out. Well, after only 24 hours, it worked!
Day by day he continued to improve. He moved slowly and stumbled and fell quite a bit, but he never gave up. There was one day that the improvement just from morning to night was astounding.
Last week was a big week! I started leaving him with his sister in a fully secure area of the outside run, increasing the time every day. He was doing great! And he crowed!
Then mom decided she was done with her daughter and was being mean to her. I wanted to keep Moira in the house for a few more nights so my daughter could hear him crow. As I did not want the little girl to have to sleep alone in the brooder, she joined her brother in the house for 3 nights. So much fun! They both roosted for the first time.
They have now been moved out to the coop full time. He is smaller than his sister, and she flies and jumps more easily than he does, but all in all, he is doing great. My family and I are all amazed at how this turned out.
I am so appreciative for the support from Wyorp Rock and Buffy Brahma Mama. Your responses gave me the encouragement to give it time and keep trying, but also made me feel that even with all the effort, if he didn't recover, I could put him down without having regrets for not doing everything I could.
I'm attempting to attach a link to a video of him from this morning. Six and a half weeks after the injury occurred.
https://i9.ytimg.com/vi_webp/knVjHT...KihrYoG&rs=AOn4CLDY8zLrRek6__NeNT3zck08GvKvXg