My father commented a few weeks ago that his Wyandottes eggs had changed in that the yolks had become much paler. The birds are about 5 years old and so he put it down to age.
He then bought some point of lay pullets ..... warren type hybrids and White Star hybrids. These are now laying but same thing. The yolks are what he describes as 'yellow' .... much paler than he would expect. The birds free range during the day and are on very good grass. They are fed layers pellets and thrown a few handfuls of corn as a treat each day.
The pullets were from reputable supplier. All the hens were wormed with Flubenvet a few weeks ago by my father.
He lives next to a river so lots of mallard on his ground, also some pheasants. He did suspect that a couple of his older birds could have had gape worm a while ago, hence wormed them all. Birds stopped 'gaping' (it was only a couple of them) and all appear healthy and laying well.
He has always kept hens but never remembers his birds laying eggs with such pale yolks.
Any ideas?