I hasten to add: pit bulls are not born aggressive and dangerous. Some are made that way by vile people who train them to be so, and I will celebrate on the day that practice ends and those responsible get what they deserve.
UPDATE: I am partly wrong: according to this page with a review of The Lost Dogs,
One law enforcement officer experienced with dog fighting is quoted as saying that as many as 80% of the dogs in a typical dog fighting operation never fight, even when coaxed and treated harshly and trained for it. 80% just don't show the aggression necessary.So even though these scum try to make the dogs fight, the vast majority don't.
I am not wrong about pit bulls not being inherently vicious or aggressive. (Details here.)
The Lost Dogs is the story of what happened to the dogs in the illegal dog fighting operation Michael Vick was involved in. From the page linked to above:
Out of the 51 dogs rescued, at least 20 were suitable for foster care immediately. Others were sent to sanctuaries, and after some work, were then sent to foster homes. Many of the fosters passed the Canine Good Citizen Test and the ATTS behavior test, and some are currently working as therapy dogs.
Only two had to be euthanized. One for aggression, and one because of a severe health problem that was inoperable and causing the dog pain.
Only two.UPDATE: Do read the comments.
And this was after the president of the Humane Society, Wayne Pacelle, publicly stated that it didn't make sense to keep any of the dogs alive.