Welsh father says parental alienation 'wrecks your life'
Frontline staff should be trained to identify so-called parental alienation, an expert has said.
PA is when one parent undermines the role of the other by turning a child against them following a separation.
Between 2013 and 2016, the Children and Family Court Advisory and Support Service in Wales dealt with 22,670 cases involving children.
The Welsh Government said it was developing information and advice services.
One father, who did not want to be identified, told BBC Wales reporter Ben Price: "It wrecks your life."