Thank you for your suggestions. I do walk him in the morning and then we go to the dog park after work for about an hour - that usually tires him out. I've given him Kong balls, but he gets bored with them when he's alone. It seems no matter how tired he may be, when I leave him alone, he can't sit still. How I wish I could bring him to work with me!! I will try harder at puppy-proofing my house in hopes that he won't chew when left alone. Roughly, at what age do most people leave there dogs out all day?? I'll let you know how it goes - thank you!!