Colour of yolks
QMy flock of four outdoor hybrids have been laying eggs with slightly bluey/green tinged yolks. Why would this be? Especially as they are being fed the same as the other birds. They free-range in my garden.
AVictoria says: If they are free-ranging the two new hens could have found a plant they are sharing which would colour the yolk. We do know that acorn consumption will provide a dark line around the yolk, but other strange colours have not yet been proven to come from specific plants (there’s a project for someone). The orange colour we expect of yolks from free-ranging hens is obtained from dark green plants – commercial feed tends to have this canthaxanthin colourant added (e.g. marigold petals provide a natural and consistent source) since pale yolks are not considered as healthy. There is some truth in this as there are less omega 3s in pale yolks.