three times now I've had eggs with blood in them. Not just a spot. A big streak. Is this something to be connected to a specific hen? Can I spot these eggs by candling them? They are brown eggs. Is there one light that is better for candling than another? Or are they all the same? I have a small flash light from TSC that I use to candle eggs for hatching. should I get something stronger? How can I identify the hen that is doing this so she can be removed from my flock? If I find another I will take a picture but you most likely have the idea. Do you candle eggs you sell?