Between different experimental groups at the same age: for 30 days of age, the relative expression of BMP-2 mRNA in leg cartilage tissue of the CHF group and BPs group was higher than that of the NC group, and the amount of BPs-H group was significantly higher than that of the CHF-L group and BPs-L group (p < 0.05). The gene discussed is BMP2; the disease is congestive heart failure.