This thread has made me think of a personal situation... and it’s making me re-evaluate if what was done at the time was indeed right...
We had a Welsh Terrier when I was young, and when I was about 12 years old I think (or maybe younger, I can't recall for sure), this dog bit me in the face. She was watching my mom cut carrots (she looooved carrots), and I bent down to pick her up... and she bit me! Of course, my parents freaked out - she had missed one of my eyes by a few centimetres, but the scratches were only superficial (no stitches needed). My parents’ initial reaction was to put the dog to sleep. But when I heard that (after the initial shock had passed and I had realised I was going to be ok) I cried and cried pleading for them to let her live! (Not saying I should or am the one who made the call at the time – I was a kid, but I made sure I voiced my opinion! Children!)

That dog lived to be 16 years old. BUT... she had some history of biting... An old neighbour of ours was bitten by that dog - in "the area" - when I was even younger....

He chose not to press charges on my parents, because he really like me, but he suffered a great deal.
Anyway, what I'm now thinking is should my parents had made the decision to put her to sleep or get rid of her earlier, before anything happen to me, or right after it did...? I'm not judging them and can't say for sure what would have been best, only that I'm so glad I got to spend 16 years with this dog.
That's why this sad story is so hard to comment on for me, since I was not there, I don't have all the info like many said... My dog was given a second (and third and...?) chance... Was it wrong? Maybe... Was it foolish (in a “it won’t ever happen again or nothing serious will” kinda way)?... Definitively… But nothing is ever black or white... At least, in my opinion. I know for some of you, it is, and that’s ok… I simply think that we can all have an opinion on everything and anything, but until a given situation – such as this one – actually happens to us directly, we cannot entirely appreciate all the heartbreaking and mind-boggling dilemmas we would need to face, and how we would choose to cope in such a tragic circumstance… Thinking about how we would handle it or having some related experiences to this tragedy helps one to make up one’s mind, but living it is another tale…
I'm not getting anywhere really...

Just wanted to share my personal story and state that I appreciate reading all your views. Even though we might not all agree, I find it really informative and eye opening to read others' comments -- when they are made in a respectful way!