Marnlou - we went through a "strange behavior" thing with a dog of ours four years ago. We had had him since he was about 9 weeks old. He was half bassett, half bloodhound. For the first year - year and a half, everything was fine. (We also had another bassett. She was two years older than Rocky) Suddenly, he started acted really strange. My husband said it was almost as if you could see a curtain closing in his eyes - as he became a snarling, scary dog. Things would "flip him out" for no reason. We took him first to our vet, who checked him out and also recommend a behavorist. We took him down to the Universiry of Pennsylvania Vet Clinic (one of the top teaching hospitals in the country) where the evaluated him. Basically, they said they didn't know what caused it...we could try working with him... or we could medicate him. We then took him to a trainer in Lancaster (90 minutes from our home) who was known for working with "problem" dogs. We diod this for another few months. Finally, after Rocky snapped at my daughter (24, just sitting next to him, petting him on the couch) and my husband, repeatedly, in our bed at night, we had to put him down. I was really aftaid that someone would come to the door, or walk up to him outside and get hurt. It's a horrible, horrible, feeling when you are constantly holding your breath with a problem dog. I sincerely hope that Stewie is young enough to overcome whatever problems he has. Good luck....I am definitely keeping my fingers crossed for you on this one.