I too have had an egg this morning had a normal yolk with what seemed to be gooey or thicker clumps of yolk that would not mix in well. I have been searching the threads. I will test out a few more to see what happens. It was only with one hen's egg. All I can think of is that she had roundworms and the others didn't. I have had a thicker yolk before or one small "glob" and have eaten them with no ill effects (scrambled cooked). This one had several "gobs" in it. I guess you wouldn't know it it were softboiled or hardboided. other than the gobs, the egg was normal shell and whites.