My Isa Browns are 16 weeks old (4 Hens), and on Sunday July 18th we had 1 small egg , which I read this is Mother Natures way of getting the hen ready for larger ones. But this egg had both yoke and white??? Normal???? The following day we discovered a large egg!!!!! The large egg had 3 yokes , all the same size as the smaller egg?????? The very next day, July 20th we had another small egg????? But since then no eggs, is this normal?????? We're pretty green at this and learnig as we go.