I was wondering what everybody thinks about feeding crushed egg shells for extra calcium and phosphate instead of oyster shell to laying hens. My chickens get layer pellets as the normal food. Should I mix the egg shells with the food or put them in a separate container. Do they even need extra calcium if they are fed layer pellets?
Yes, you can feed egg shells back to chickens as a calcium supplement.
Put the shells in a separate container, so each hen can have as much or as little as she wants.
Layer pellets are supposed to have enough calcium for laying hens, but some individual hens might need a bit more sometimes. Chickens are usually pretty good at eating the right amount of calcium if it is offered in a separate dish.
Just the shells from their own eggs would not provide enough calcium for the chickens if it was their only source of calcium. But the layer pellets have enough calcium, or almost enough, so the eggshells will probably be enough of an extra supplement.