Second? How many minutes did you stand? My legs are shaking.
Third? Do you tremble when you sleep? Caused by many dreams
Fourth? Do you see your joints are not straight when you stand? A little bent
Fifth? Fragile bones? Always tilt one of your front or rear legs (that's because calcium deficiency is uncomfortable)
That's all. Often drinking bone soup or adding calcium powder will change, and the phenomenon of calcium deficiency in the development of puppies is more worthy of attention.