My sister told me on Wednesday that she learned that the dogs trained to fight in these things have to be medically killed when rescued from their abusive trainers/owners. The reason is that they have basically been conditioned to become killing and maiming machines, and cannot "unlearn" their conditioned impulse to violence. So their lives are thrown away no matter what...if they don't die in these blood-sports, they will be killed when discovered and rescued by the authorities. It's really tragic, and so utterly senseless.