At about 10:30 this morning (October 24, 2015), in Oklahoma, a crowd of people congregated to watch the State University homecoming parade. Suddenly, a car struck a police motorcycle, then drove straight into the crowd. As a result of this, 3 people were killed and 34 others injured.
For birds that are laying large numbers of eggs, an easy and high calcium supplement is dried egg shell ground to a powder and added to their normal feed. Layer pellets are supplemented with calcium as well. Soft or thin shelled eggs may indicate calcium problems in your birds.
Note that Mealworms are calcium depleting. Consider supplementing calcium when feeding them to nestlings. Sources: One source you can provide is crushed eggshells. Bluebird parents often eat the eggshells of their hatchlings - perhaps to benefit from the calcium content and also to clean up the nest.