You find that you have an egg in your jacket pocket when you get to work.
I never made it all the way to work with an egg in my pocket, but I have taken a jacket off the coat hook and found an egg in the pocket.
YKYACL,
When you read hatchery catalogs in bed before you go to sleep.
When you go out to open the coop at dawn on your day off.
When you have more pictures of your chickens on your phone than of your children. (To be fair, my teen and young adult boys are a big camera shy).