Omega3 Eggs?

What are omega3 eggs after all? Eggs coming from hens that receive omega3 rich food seem to have better micronutrient content as compared to regular eggs, as this study shows:

I could only find omega3 eggs in Rewe, 1.89E/6 pack. That is 0.26E/egg as compared to 0.12E for the regular one.

While the best eggs for me are those coming from backyard raised hens, for now I will while in NRW choose the omega3 eggs.