I think this is pretty normal, whether the eggs are large or not. I regularly boil bantum eggs. If your girls have just started laying, the egg size will gradually improve. There are lots of threads about peeling fresh eggs and the various tricks. I personally place my eggs gently into already boiling water, boil for 12-14 minutes, then ice bath. Aside from the occasional issue, I have found this to be very helpful in peeling fresh boiled eggs. Search it within this site, it is an often talked about issue, and lots of ideas from vinegar to salt in the water to help make it easier. Good luck.