My RIR's started laying about 6 weeks ago and the eggs sizes are really improving but when we boil the eggs, its almost impossible to peel them. The membrane seems very thick and sticks to the egg white so we end up with a very tatty and broken egg. I've tried boiling from cold and warm, cooling before peeling, peeling them hot etc etc etc, but it makes no difference. My hens are completely free to range the whole farm with layers pellets available to them at all times. Could they be deficient of something?