Ah, the age-old debate between higher IQ's (Babies with a specific variant of the FADS2 gene [approximately 90% of all babies] demonstrate an IQ an average of 7 points higher if breastfed), superior nutrition and severe attachment disorders continues. Regardless, I'm sure all the experts would argue that this girl over 4 times the recommended age to stop.
From Wiki:
The World Heath Organization (WHO) recommends breastfeeding for up to two years or beyond and exclusive breastfeeding for the first six months of life. The American Academy of Pediatrics (AAP) recommends at least one year of breastfeeding and exclusive breastfeeding for the first six months of the infant's life. Exclusive breastfeeding for the first six months of life "provides continuing protection against diarrhea and respiratory tract infection" that is more common in babies fed formula. The WHO and AAP both stress the value of breastfeeding for mothers and children. While recognizing the superiority of breastfeeding, regulating authorities work to make artificial feeding safer when it is not used.
Written by Dignan

