Morning all.
One of my chickens has started laying very soft eggs, sometimes they have a shell but it is very thin, sometimes they are soft shelled, sometimes no shell at all (just the inners on the floor) and twice now a sort of gloop with blood in it.
The chickens are about 18 months old and have layed without any problems until this - laying well all through the winter too.
About two months ago I started to let them out of their run most days. Sometimes for the whole day, sometimes just for a few hours. The run had become very bare and there was all this long grass and garden all around for them to explore, much of it very overgrown. I had not done it before as there is no way of keeping them off our neighbours gardens - but a conversation with the neighbours, who all said not a problem, resulted in them coming out.
At around the same time we started to get one huge egg a day - as big as (if not bigger than) a duck egg. Sometimes they were smooth, sometimes pale and sometimes the most revolting "wrinkled" shell on them.
Nothing else has changed - their food is still the same, their run and house are still the same, they still get cleaned out and changed exactly the same and I have treated for red mite (although there is no trace of any). The only difference is that they are out and about a lot more.
Some areas that they are now exploring are very overgrown and some are cultivated. They venture down to the yards every day and there they are scratting at moss.
They all seem happy and spend their days exploring the garden (and sitting on the window sill looking in to see what we are doing) - its just this one (I assume that it is just the one) chicken laying these horrible eggs.