I have a 5 month old golden retriever (not pure breed). He's name is Frederico. He's a sweet dog but very energetic. During the day, my husband and I leave him loose in the garden from 8:00-14:00 until we come back from work. During this period he "literally" eats all the piping system, takes the clothes from the line, etc. We're trying to educate him, yelling at him and hitting his butt a little bit but it's definitely not working. He's doing the same mess over and over again even in front of us. I love him to death but my husband can't take it anymore and wants to give him away. What can I do? I need an advice!!