Parental Alienation Syndrome is extremely heartbreaking for the non-custodial parent to deal with, as normally they are completely innocent of wrongdoing. The custodial parent uses whatever means available to get the child(ren) to not want anything to do with their other parent.
All children are entitled to having loving, caring relationships with BOTH parents. They need to know that both mom and dad love and care about them. The parent, normally the mother, will say bad things about the other parent to the child(ren), interfere with visitation, and attempt any reason to keep the child(ren) busy so the the other parent cannot be involved.
It is time that the whole country becomes aware of this, and takes steps to help the child affected by this. It is not healthy!