First of all I hope you will continue this thread. In one way or another.Changes. I have realised sometimes during this week, that I am not reaching the goal I had creating this thread. I intended to have everything about my chickens in one place and especially health issues, because I had more than once the need to look back on things that had happened in the past days, weeks or months for a chicken. But a thread like this with lengthy daily description isn't efficient for that.
Maybe the app Anymal would work for you? I used the original Dutch version but its available in English as well nowadays.
https://www.backyardchickens.com/reviews/anymal-app.12064/reviews#review-13497
I use it to keep track of the most important chicken things. All the chickens I lost are still there, in the archive. I made this screenshot last summer when I still had Chef and Abbey to make me happy.
Geboortedatum is hatch and guessed the date for Kraai.
Ik you click on a chicken you can see/add more info.