I have had chickens for a few years now ( mixed flock) . I get eggs every day. I purchased some chicks to add to the flock last year. They are BCM hens. They have been laying about an egg a day for the past two months and are aprox 8 months old. About 2 weeks ago one of the BCM hens laid and egg with no shell or membrane - just yolk/egg white. She stopped laying eggs for about 2 weeks after this & then started laying again yesterday. Anyone else ever have this happen?