Egg thickness by breed?

[Stoney Meadow Maple]

Ive got a mixture of ducks, Pekin, Rouens, Welsh Harlequin, and Runners. I cant be totally sure but I believe the WH and runner eggs are more like the thickness of chicken eggs. The others are extremely thick, like one might expect from a duck. They are fed all flock, and have access to calcium all the time.

 

[Miss Lydia]

My Runner eggs aren’t very thick more like a chicken egg. My Buffs are thicker my Muscovy well you about need a hammer to get into one.