I don't think you need to worry about calcium unless you are trying to feed your chickens a diet of mealworms exclusively. If you crush up the eggshells and feed them back to the chickens, you will be providing them with calcium. I also keep oyster shells available all the time, as I have one girl who consistently has thin shells, and lays from the roost occasionally. I guess I should put a feather pillow on the coop floor under her.DebFred said:So you buy some mealworns, do the bedding and newspaper, and wait for them to grow? I am confused on the calcium/phosphorus ratio. How do you know how much of each, and how do you feed calcium to a worm? Grind up the eggshells? Sorry to sound dense....seems to be happening to me a lot on this forum.... Still love it though!