@SalvemosABenito The child is not responsible, the parents are. The dog is not responsible, the owner is. Pets are not toys; children should be cared for and not left unsupervised.
@TUIT3ROMX Science shows that it can be detected in childhood through traits of emotional insensitivity (Conduct Disorder). It's not just 'the parents' fault'; there are neurobiological factors behind this....