Whose eggs? Polish or Duck?

[PowellAnimals]

For the past few weeks I thought my two Polish hens were laying but based on the differences in the eggs now I am second guessing myself. The eggs I get everyday are small white eggs and large white eggs that appear to be dirtier but that is indeed their color. I have two Polish, a Silkie, a duck that was sold to me as a Runner but looks like a Cayuga, and two Dominiques all older than 20 weeks old. I have seen one of the Polish lay the small white egg and the other Polish has been crouching and doing the egg song for weeks so I assumed those two were laying and I thought the younger Polish would eventually lay the larger eggs. However, it has been about over a week of the smaller eggs and today I found two small eggs. Is it possible the duck is laying the larger eggs or is it possible for the eggs from the same breed to be that different?

 

[Free Spirit]

One sure fire way to tell a chicken egg from a duck egg is the texture. A duck egg is smooth. When you try and crack a duck egg it doesn't break as easily as a chicken egg because the membrane inside is stronger. Duck egg whites are thicker than a chickens egg. A duck egg can average around 65+ grams and a large chicken egg is around 50- grams. I would say your larger eggs are either double yolk chicken or duck egg (if smooth).

 

[PowellAnimals]

Definitely duck eggs then! Thank you so much for your response!