Our Havanese puppy came to us from multiple broken homes. Yes - another "used" pet, seems to be a theme. Toby (who was named Bruce and then Tobi), came to us by way of the breeder who took him back twice, and then sold him to us. He's had a few rough starts and housebreaking has been a trial... mostly due to his insecurity. All told he's doing much better than he was the first month that we got him. He suffers from separation anxiety. Apparently not uncommon for dogs. This means that he really, really wants and needs to be around people as much as possible.