We've got 7 of our own chooks so we only eat their eggs. When they first started laying we occasionally found blood spots in them, not so much now. We always eat them regardless. I think it's harmless. I'd never buy supermarket eggs again. Farm eggs from chooks that have access to good green pasture taste way better. They get so much good stuff from the bugs, worms and grass (you'd be surprised how much actual grass they consume, I think this is the reason our chooks yolks are so bright yellow/orange).