My American Staffordshire Terrier/ German Shepherd mix (aka Pit Bull type dog) LOVES and respects our chickens. He was adopted from a shelter and didn't meet chickens until he was 8 years old. It depends on the dog's individual temperament, not the breed. My lab mix is not good around my chickens, my previous lab would have been good. Depends on the dog, how you train them, and their experiences with chickens.
Also, do not leave your dog outside alone during the day if you don't have a fenced in yard and you have a road nearby. That's asking for trouble.
Maybe I read that wrong(ish).
I was saying that lumping all terriers into one box and labeling them all as chicken killers was disagreeable to me in the post you quoted.
I love terrier breeds.
Is your avatar your good boy? I am glad you gave him a chance.