These children may not feel neglected now but it is much possible that when they grow up and become more aware, they would actually resent their parents realizing that they were neglected as children. The little girl seems to be acting out her frustrations already by being mean. It is unfortunate for children to be in such condition. I appreciate your care for them even though they are not your children. The real parents though need to take more active responsibility and if an external agency (like social welfare) is needed to remind them of this, then it has to be done.