Two Eggs from One Chicken in One Day?

[citychickinthecountry]

Can a newly laying chicken (Ameraucana Bantam) lay two eggs in one day? Or is it possible that another one of my chickens (a Black Tailed White Japanese Bantam that was laying smaller beige eggs) is now laying slightly larger blue-green eggs?

 

[bwebb7]

good question~ I think that they only change in shade not color.