I am so sorry to hear that happened, but it sounds like he was loved till the end, which is more then if he had been at the feed store. You did good, thumbs up, all you can tell yourself is you made the little chick's pass warm and loved. Sorry again
I lost one of my 3 yesterday, it wa awful, and I had never had any chicks before. Atleast she wasn't neglected in the store, she was warm, hanging out with my other two. I did what I could and so did you. You just have to appreciate the time you had and not blame yourself. I did what I could, might have been illness, parasites, who knows...
things happen for a reason, hun
and things like that just happen
maybe when you go back you'll find another chick that u just love
im sure the little guy went in peace and was very happy