Give them more space so they can get away from the heat, see if that helps.I'm not sure what the temp is. I'm planning on them going out during the day starting this weekend. Then full time 2 weeks after. I thought she was coming around but now I'm not so sure. She's the smallest and was when I got them too. Has always kinda kept to herself. And slept all the time. I'm not sure she will make it. I caught her eating on her own yesterday am, but nothing since. I've been forcing fluids from an eye dropper. I made scrambled eggs and added the shell she won't touch it. I gave just egg yolk and made chicken mash.. nothing. I'm just kinda lost. She stays under the heat most of the time sleeping. Thank you for your reply.
Can you get a video of how she acts and a photo of her poop without the light?
Check to make sure her crop is emptying overnight as well. Usually a chick that young won't eat egg shell, so I wouldn't necessarily provide that.