Sometimes there will be small brown spots inside the egg. These are protein spots which are completely harmless.
The yellow colour of the egg yolk comes from the two red-yellow colours of vegetable matters – carotenoids and xanthophylls – which are found in vegetables and fruits. This explains why the hen’s feed can influence the colour of the yolk.
The egg white is formed in the embryo around the egg yolk. The egg white consists of four layers which are sealed by an inner and outer membrane.
In average, the hen lays around 300 eggs each year.