The effect of feeding rachitic diets, containing different ratios of calcium to phosphorus, on the calcium and inorganic phosphorus of the blood serum of chicks
Poultry Sci 8(6): 335-343
When a rachitic diet low in Ca but high in P is fed to growing chicks, noticeable leg weakness appears at an earlier age than when a rachitic diet low in P but higher in Ca is fed. The blood serum of chicks, on a rachitic diet, in which the Ca content is higher than the P, is higher in Ca than inorganic P. On the other hand, in the blood serum of chicks, on a rachitic diet higher in P than Ca, the inorganic P is higher. When cod-liver oil is added to rachitic diets and fed to chicks suffering from leg weakness, it tends to increase the Ca content of the blood serum, no matter what the ratio of Ca to P in the feed. When cod-liver oil is added to rachitic diets, in which the P content is approximately 3 times that of Ca, it tends to lower the inorganic P of the blood serum of chicks fed this diet. On a rachitic diet in which the Ca content is greater than the P, when cod-liver oil is added, the inorganic P of the blood serum of the birds increases.