Hens are all free to roam and receive a corn and soy free feed. No flax. Color of yolk will vary based on weather and how the girls "feel" about foraging. Absolutely on grass.  SMALL farm raised. NO large buildings.
These eggs will VARY in color depending on breed of hen. 
No vax.  These average LARGE at minimum.  Be cautious not to crack as some are really big. All cartons weighed to be 24 oz at least.
Eggs in our 3 door “fridge” are unwashed and unrefrigerated. They can be left on your counter for 2 weeks then refrigerated for an additional 3 months. 
These eggs come from local farms:
Thrivestock
Prairie Farmstead
Sometimes a friend in Whitewright (unmarked)
All follow the same standards and I trust them completely.