What are the control measures for laying hens producing thin-shelled eggs?

Measures to prevent and control thin-shelled eggs in laying hens: First, add calcium or vitamin D3 to the diet; Second, adjust the calcium-to-phosphorus ratio. During the brooding and growing periods, when the calcium-to-phosphorus ratio is 1.5 to 2 to 1, the absorption and utilization rate of calcium and phosphorus is relatively high; Third, environmental regulation. In summer, poultry houses should be ventilated and cooled, and in winter they should be protected from cold and kept warm, so that the chicken house maintains a suitable temperature. Strengthen feeding management, keep the chicken house environment quiet, minimize various stress factors, and create a good egg-laying environment.