My baby is 2.5 year old but she is not walking alone not balance properly

A. I am afraid to say this but it is high time that you visit your doctor because there is a massive delay in the growth of your child as a child should learn to walk independently by the time of 17 months okay and now it is 2 1/2 years where you still see the child properly the balance is not proper that means it is a matter of concern