Last year we got 6 buff orpington hens at 26weeks - already laying wonderful large brown eggs. This year a friend raised 10 orpington chicks for us and we took posession of them at 6 weeks. They are in a pen with 2 older birds (last year's layers) and are just now laying. We got 2 new eggs this morning that are much smaller than the usual size for orpingtons. Is this normal?