My BR, Dumpling, laid an egg on 1/8 that had a very thin shell. On 1/10 she laid a weird "sack egg" - no shell, just the membrane. She's on layer feed, with extra egg shells in their feed and free-choice oyster shell. No egg yesterday. She's a new layer, and has only been laying about 2 weeks. Should I be worried about egg-binding, internal laying, or...? Thanks!!