My dog Sammy was passed around to so many different homes that it took him forever to get use to us. Then when he finally got use to us he started having really bad nervous spells when we had to leave him home alone. He would get very destructive when we was not home. But with years of love and care he has finally grew out of his destructive phase. My dog Sammy is such a sweet little booger now, he still barks when he first meets people but it is not as bad as it use to be.