The article here http://tinyurl.com/bnd4k speaks about JK Rowling weaning her one year old daughter so she could toddle off to Romania to see how she could help children's health there.
She stopped nursing her baby so she could go see how to help other children be healthy?! Doesn't she see the amazing irony in this? Our own children are our FIRST responsibilities, for if we cannot sustain them (physically, emotionally, spiritually), we all perish.
Sure, formula might be dandy in a pinch or for private issues relating to sexual abuse or previous cancer, but to wean one's child... to actively cut one's own child off from the beloved connection and continuing health benefits... in order to go to other children is just horribly sad. Her poor daughter.