question about eggs

[Nona Urbiz]

I have Isa Browns for the first time (previously preferred other breeds) and I TOO HAVE THE SANDY GRIT on the egg shells. I know what calcium deposits are and this is not that. Did the original poster find out what it was?

 

[Wyorp Rock]

I have Isa Browns for the first time (previously preferred other breeds) and I TOO HAVE THE SANDY GRIT on the egg shells. I know what calcium deposits are and this is not that. Did the original poster find out what it was?

Photos?