[Midnight Cowgirl]

Originally Posted by DAVES

Just beware. Many dogs in the shelters are there for a reason.
Some have been abused. Some have traits that a previous owner could not deal with.

My sister who has always had dogs, adopted a German Shepherd mix from a shelter. Not saying anything for or against German Shepherds. She was instructed by a Vet the dog needs to be put down. Apparently a mental disorder. The dog would be fine most of the time. Then, with out any warning, dropping it's tail, growling bearing it's teeth etc. the dog would unprovoked attack-not a nip but a violent attack.

Well, it's obvious that the dog had a story preceding what happened. Forewarned, your sister who adopted that dog should have known better.

Unfortunately, there are people who also fit the description you described, sans the tail!