This morning when I let the girls out I noticed a wind egg on the floor of the tractor. It had been broken open and the yolk partially eaten. This is the third one I have found in two weeks. I noticed the first one when I saw noname acting funny while she was out freeranging and she laid a windegg on the lawn. The next morning I found one on the floor of the tractor but quickly pulled it out before the girls could get to it. I am not sure why this is happening as all of the eggs I have been getting have very nice shells on them. Does anyone know what causes this? I am not sure if it is just her laying them or if it is one of the other girls. They have 24/7 access to layer feed as well as yogurt twice a week, boss once a day and any veges/fruit I have extra of. They freerange almost every day for an hour or more. For those of you not familiar with the term, a wind egg is an egg with no shell and possibly no yolk as well. It looks like a water balloon. Any input would be helpful.