On the money again Dave, I used to train dogs as a sideline a few years back, by train it was mostly basic obedience, walking to heel and such like, of course I was presented with a variety of breeds that the new owner expected them to behave as a 'Lassie' type.
As you know training any dog is 95% the owner and 5% the dog, well not quite but you know what I mean. I had Rotts Alsations Poodle, all sorts, and although 'heel' work was easy anything beyond that presented different problems.
Guarding breeds are the easier to to train in all aspects, but of course offer the greatest threat to the public. And it is with these breeds there is an almost indifference as to the potential risk they offer, and can end up in the wrong hands.
I rescued a Boxer x Lab (Toby) many years ago from the RSPCA Nr Bournemouth, as soon as I let him off in the local park he went straight for a little terrier and clamped on, I managed to seperate the terrier from his jaws, but not before cutting my thumb that needed stitches, imagine my horror that it was the nurses dog that stitched me up that Toby attacked!!
He was a loving dog with people, in fact we had our three sons grow up with him, never a problem, but other dogs? Forget it, and I as a ex RAF Dog handler could not train that out of him.
I found out later that Toby along with other dogs were rescued from a dog fighting syndicate in the New Forest, so no wonder.
He went on to live a long and full life, but couldn't bear being seperated from the family for even a minute, I am glad Toby chose us
We have rescued all sorts, but the most cutest and un dog like had to be the Belgian Griffon, that was going to be put down by her owner because she was 'too stubborn' I went to the Nursing Home for the interview as a potential adoptee, booted and suited, not really wanting the thing, but was accepted with a waive of the hand, and told to collect her from the Boarding Kennels. Of course the kids fell in love with her from day 1 little Mugwai
Sorry about the ramble, it's an age thing.