Nice!Aart - Here’s a few pics, snows starting to get a little depth now.
Run looks iffy with CW and 2x4......I'd say you've been lucky.
How many years?
What's on run roof....must be fun to get snow off there.
Good examples of anti-dig apron installation.
If rodents are prolific, burying the apron ~12" would be good.
https://www.backyardchickens.com/threads/wire-around-coop.1110498/#post-17093528
https://www.backyardchickens.com/threads/new-coop-project.1169916/page-2#post-18481208