wow, I'm so sorry to you and Bella and Anna, Charlie, and Chloe.. what a sad experience to happen to such great owners, and a great dog. I agree that Arthur was unfortunately "wired wrong"... and it would definately only get worse, since he was only 8 months. Don't apologize at all!.. Both of you are so brave to sacrifice your baby for the sake of your dogs, and all the other dogs and people Arthur may have hurt in the future. It's easier said then done, but you guys shouldn't feel guilty, what you did is the most responsible, ethical, and loving thing you could've done for Arthur ... can't even imagine your pain, but I hope you all feel better soon, and try to be comforted by the fact that you really made the safe decision. I also agree to let his breeder know about this, if you haven't already..