I've just joined the group and saw your post. I've never heard of sour crop. I will be looking more into it. Maybe using some heat will help. Do you put probiotics and electrolytes in the water? Could try that. And a little sugar can give a boost of energy to stimulate feeding. But look into all this first as like I said I've not heard of sour crop and don't know if my suggestions would do more harm. I wouldn't think they would but you never know.Well, after no response here I posted on Reddit and they think it Is likely sour crop and that I should wake the chick, give olive oil and massage the crop. I've never done this before and not sure it is the right thing. I am so exhausted, I can't think straight.
I reread @azygous article on crop issues and I'm thinking I should wait until morning to see if the crop is still empty and puffed up. God, I hope this is the right thing. Ruby is my favorite and she's really the first to become attached to me.