I've been waiting to respond until a safe period of time has passed.
I used them. I didn't dump the eggs, mostly because of cost.
Despite the fear that they might be contaminated by the red yolk that may or may not contain some harmful something, I went ahead and blended them all in. I was hoping that the cooking time would kill whatever potential harm. I did fish out a dark red stringy thing from the batter. It was really small, but not knowing what it was, I wouldn't want somebody discovering it in their cupcake.
Besides, I had to make a decision in the wee hours of the morning when there were only 2 other registered users online (who didn't respond).
The batter was slightly darker, but not noticeably. And as of now, there has been no report of ill effects. (Whew!)
Considering there are 8 in our household alone, I figured by percentages we'd see or feel the effects in at least one.
Call me crazy, but we eat them. Eggs is eggs.
That was my first inclination. If I ever run across it again, I hope it is when we are fixing breakfast so my kids can be impressed/fascinated/grossed out.
The red egg is one from an egg that was successfully fertilized and has started to develop. This sometimes happens when you get eggs from the happy chickens from the farm where couples mingle. It is rare to get one from the store were almost all the eggs come from the chicken nunnery.
When I bought my eggs from the farm, if there was only a tiny-tiny bit of development, I would add it to the mix. I would have first tried to fish your bloody one out, but may have ended up throwing them all away. When I buy from the store now, I crack all in one bowl. When I bought from the farm, I cracked each egg separate into a cup before adding.
Hope this clucks, um, helps you.
YES, thank you.
It relieves me.
And surprisingly, this one came from the store.