Sorry about going back on subject - back from a friend's for a cool water and mint drink - very refreshing.
Rosalind, You needn't think you may have done some damage to your children - all you were doing was protect them, as any sensible mother should do. My parents, like me, were great dog lovers, yet I was taught never to stroke or get too close to one if I did not know it - and believe you me, they had quite a job making sure I didn't - I was drawn to them.
Jazzy, the other problem with some dogs classified as 'potentially dangerous' is too much incestuous (is there such a word?) breeding, mainly because that particular breed has become fashionable ; once again, money greed responsible.