So I have a hen that has been laying some odd eggs. She lays soft shelled/no shelled eggs quite often, and is also very old, at the age of 6. She only lays an egg about every couple of weeks or so, 75% of them being soft. They do get oyster shell, I feed back the shells of eggs, plus extra calcium in her pellets, but still soft eggs. Lately though, the eggs have been lacking in a yolk. They are only whites, and seem to have some strange black dots in them. It looks like a black blood spot. There are always two, as well. I should also mention that she is starting to feel her age, moping around, eating less, weaker than normal. She is probably going to have to go soon. But I am curious as to what the black things/ no yolk/soft eggs are caused by. Could that be causing the moping? Unfortunately she has not laid in a while, so no pictures. Please help, she is my favorite!