Egg Size Question

[ThornyRidge]

I believe it is my Salmon Favoerelle that lays normally a smaller egg but lately I have been getting these tiny little eggs.. one not too much larger than a robin's egg. She has in the past week produced these tiny eggs that are so cute I am carefully blowing out the contents and keeping the shells.. there has been no change in diet and she is just now one year old. I have noticed from this batch of varied hens I got last year at this time from a hatchery they are all producing inconsistent sized eggs. The egg sizes vary slightly day to day.. now several years ago I had a RIR and a Barred Rock hen that consistently laid jumbo brown eggs without any difference for several years.. what gives?

 

[Poulets De Cajun]

Have they just come out of a molt, or being broody. Sometimes after a break in laying, it takes a week or so before the eggs return to normal.

My second thought was if they are possibly calcium deficient. Are they getting a balanced diet with the proper amounts of calcium?