its not really a problem as far as i can see. someone said something like this would happen if i gave my hens more greens like green lettuce. my brown eggs have even darker brown spots its vary weird. i just want to now some other reasons this might happen and are they safe to eat.
sometimes eggs have speckles. It's just shell color thats all. White, tan, brown, darkbrown, blue, green, olive, and pink, its all the same on the inside.