Is it normal that my 11 month baby is thin because he is breastfed?

Breast fed baby. Breast fed babies sometimes find comfort in latching to the breast and forget about hunger. Although most breast fed babies are well proportion to their height and weight growth. Aap ( american academy of pediatrics) guidelines clearly suggest breast milk as the best form of nourishment for babies. Upto 4 mnths exclusive breast milk and afterwards supplement with baby food.
Breastfed. Breast fed babies are usually chubby or fat not skinny, the baby may need formula supplementation, see your baby's doctor and discuss diet with him/her.