If there is a significant amount of soft shell eggs in the whole laying hen, it means calcium deficiency in the feed should be fed with glucose and calcium, which can immediately improve the formation of egg shells and the egg production will return to normal. Then some calcium-rich mineral feeds, such as eggshell powder, shell grain, bone meal, calcium carbonate powder, etc., should be added, and the feed mix ratio should be improved. The correct amount of calcium is given: 0.9% before laying, 2.7% when opening, 2.25%-3.75% for high-yielding and breeder chickens, and increased in summer for high calcium content due to high temperatures and low feed intake. %. Sooner or later, the hens should be exposed to sunlight, or a small amount of cod liver oil should be added to feed to supply vitamin D and promote the body's absorption of calcium.