I can't understand a statement that all pit bulls should be euthanized. I am not really into blanket statements in general. That being said, I agree that the pit bull breed seems to be the most dangerous and have the most horrific stories associated with them.
The only experience that I have personally is that my cousin and her husband own a pit bill. They have no kids, so their dog is like a child to them. The dog has interacted with many generations of our family and he is friendly and lovable. If David were to try to euthanize their pet, I would suggest he bring an arsenal. My cousin's husband is also a gun collector
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Jeff