Baby is 1 and half year old ,she very fine and active and eat everything means everything is going to fine. but she is too weak and no  weight gain, doctor said she is fine,and advise zincovit syrup but nothing going to grow her weight. another thing is that her teeth, she irritate so much and got weak, give her sbl tab for teethring trouble but can't do more. so plz suggest something that she grow more and have normal weight, her pic is attached plz suggest for tethering trouble and for weight gain...plz plz