some dark spots in yolks, but not blood spots

[hessjero]

we are new to chickens, and have been getting eggs from our hens since last September, many of the eggs will have a dark reddish or brownish discoloration in the yolks, these are not blood spots, can anyone tell me what they are?

 

[redhen]

Can you post as pic on here?..it will help us out.