One year old baby calf walking not straight may be physiological phenomenon, congenital development problems or calcium deficiency caused by the need to find the cause of the symptoms of the treatment. 1. Physiological phenomenon: newborn babies calves will show a bent state, this is a normal phenomenon, usually lasts until the age of 1, and with the walking and exercise gradually corrected, generally do not need to worry too much. 2. Congenital developmental problems: If the legs do not walk straight due to congenital developmental abnormalities, or lower limb deformity seriously affects the child’s standing, walking, need to consider correction, it is recommended to go to the hospital for an examination, and then under the guidance of the doctor to formulate a reasonable and effective corrective program, treatment and correction. 3. Calcium deficiency: If O-legs or X-legs are caused by calcium deficiency, it is recommended to take calcium supplements or eat calcium-rich foods under the guidance of a doctor to improve the symptoms. Usually, we should also take more protection, guide children to walk in the correct posture, daily diet should pay attention to nutritional supplementation, you can eat more calcium-rich foods, to develop a good dietary habits, to avoid the situation from becoming more serious.