She probably has another egg stuck inside. Give her a calcium citrate supplement.
View attachment 2541251Oyster shell and egg shells, while very high in calcium, are not easy to digest and absorb. Calcium citrate is what I use in a reproductive crisis as it's easiest to digest and absorb.
There are three different sources of calcium, all different, all digested and absorbed at varying rates of effectiveness. The most common source is calcium carbonate. This is what egg shells, oyster shell, and calcite derived calcium supplements are. It's the highest in calcium, but it's the most difficult to digest and absorb. Some hens absorb it so slowly and inefficiently that it's not able to adequately supply their shell gland. So, they often produce shell-less eggs or very thin shell eggs.
The second kind of calcium is calcium gluconate. It comes from fruits and vegetables. It's not very high in calcium and still hard to digest and absorb.
The third kind of calcium is calcium citrate. It's the by-product of the manufacturing process of making citric acid. This form of calcium is very easy to digest and absorb. For this reason, it works much, much faster than the other two types of calcium. This is the form of calcium that's best to use when a hen is having reproductive issues from the relatively minor one of shell quality to the most serious and life threatening one of egg binding.
One calcium citrate tablet with vitamin D given right into the beak once a day until the issue is resolved is what I strongly recommend.
