No - since they are living independently outside of the mother's body - they are a living individual, and as such, are protected by the law.Wouldn't this argument allow parents to kill newborns, since they arguably haven't been socialized with culture and language yet, and therefore aren't, according to these standards, human? The very few but still intriguing "wild child" cases also come to mind; I've seen two documentaries of kids who have grown up without socialization--no language, no culture, wild children. Where would they fit in?
"Wild child" cases are intriguing, it's true, but still are their own existing individuals. Of course, there was a period of time in our recent human history where people with learning disabilities, or physical disabilities, were considered "less human", but we're learning to go beyond that.