This one?
https://www.backyardchickens.com/threads/how-to-take-better-photos-of-your-chickens.1414631/
Excellent advice there....
...might be put into the first page of all the photo contests @Nifty-Chicken .
Not that this thread is for discussions......
Feed them whole flock and 'all flock' type feed, and oyster shells in a separate feeder for the active layers.