Answer: Hey don't waste your energy in thinking why your baby isn't chubby. As long as she is active, timely achieving her milestones and is eating well there is nothing to really worry about.
Baby’s body structure and fat storage tendency generally depends on parental genes. Many babies can be really chubby whereas certain will have a leaner body. Its just their body type accept it. Overfeeding them or giving lots of ghee, butter etc might trigger child obesity in baby. Let her enjoy being herself.
Your baby shouldn't be suffering from malnutrition or being underweight as this might hinder her growth.
Make sure your baby is having a balanced diet which contains a portion of proteins(meat/lentils ), Cereals, carbs, fruits, vegetables and fats.
The frequency of meal should be 5 times a day.
A healthy happy active baby is best one can ask for.