One of our Barred Rocks is laying all small eggs. They are slightly larger than a robin egg. I have read posts here about small eggs and the usual answer is that 'it's normal as long as it's just occasional'. In our case, I believe that all of here eggs are tiny. I have collected 5 in the last seven days. I do know that up until about a month ago she was laying normal size eggs. We only have four hens so it makes it easy to figure out which one is laying these small eggs. Our girls are all about eight months old and all appear healthy. Any insight would be appreciated.