Between different experimental groups at the same age: for 30 days of age, the relative expression of VDR mRNA in leg cartilage tissue of the CHF and BPs groups was lower than that of the NC group, and CHF-H and CHF-L groups were significantly higher than those of the BPs-M group (p < 0.05). Here, VDR is linked to Bartsocas-Papas syndrome 1.