If the dog does not get enough calcium, the ribs may be everted, and the wrist and elbow joints of the forelimbs may be deformed. Small dogs are prone to O-legs, and large and medium dogs may cause serious deformation of their forelimbs. If not found in time, improper treatment may also lead to permanent claudication. Calcium is supplemented with yogurt calcium on time, and liquid calcium is easier to absorb.