I think I scarred my children

I would like to say I'm joking, but I'm not. You see, in January of this year, we decided to get a puppy. The kids had been begging for one! Erik and Nate went out and picked one up. We found an add in the paper for a mix. They brought him home and the kids were in love. He was a gorgeous dog and we named him Hunter. He looked just like a tiger. When we walked him, people would literally pull over to the side of the road and tell us how gorgeous he was. Looking back, that is the only thing this poor puppy had going for him. He was truly impossible to train. We tried everything! We watched videos. We bought special collars. We bought the treats. We did the positive training. We exercised him and tired him out. We did it all. This is one puppy who did not want to please his owners. At all. After going for long walks or playing he would come in and go potty on the floor...right in front of us while LOOKING at us! The boys would be afraid to come down in the morning because of him jumping on him. Both boys have scars now because of Hunter. Literal scars on their body. After his behavior got worse (I don't know how it could have) and he started biting (thank God no blood was drawn!) we decided he was not fit for our family. We couldn't trust him with the kids. As a family, we decided that we were not the family for Hunter. We gave him away to friends of ours and it got worse from there. He ended up attacking the father there and their full grown son. I feel absolutely horrible. I don't know what else we could have done to save Hunter. But, through all of this, the kids have talked about getting another dog. We decided we would not get one for a few years until the kdis could help more and be more responsible. But, what can one do when an opportunity gets dropped in your lap? You seize it! So, we are now the owners of a four year old Boston Terrier named Charlie. He is absolutely wonderful and the perfect dog for our family. The kids were nervous at first because they were scared to death they were going to get hurt (physically) again. It's been a few days and they have finally realized that Charlie listens, will not run away, will not bite them and will not hurt them. I feel horrible that I scarred my children physically and mentally from a dog who was not meant for our family. But, it was a learning process for all of us.