That’s really interesting - I have a glut of blue eggs here and I didn’t even try for them! I get eggcited when I get a pink oneJust ran across this thread. (Don't worry it's only 6 pages). He's got some golden laced laying blue eggs too....
https://www.backyardchickens.com/threads/silver-laced-wyandottes-that-lay-blue-eggs.1559583/
