I might receive some flack for this answer but I would try to re-home Rosie ASAP. As the mother of a two year old grandson I wouldn't want any animal to have the potential to put him in harm's way. That said, I realize that Lucy may have caused the attack, but it shouldn't have led to retaliation leading to death. I am quite sure that my Bella would never in 1,000,000 years hurt anything even if she was being attacked. She is at times even overly condescending to Ripley (our mini), letting him have things that she had been playing with, and I know she would never harm a hair on my grandson's head. Temperament to me is first and foremost, especially when it comes to dogs and children.

I would love to hear that Rosie has found a new home in a family without small children. Just my humble opinion. Either way, this is so very sad all around for dogs as well as people.