So, my now 7 month old Great Dane/English Mastiff neutered male is destroying things. He has SOOO many toys thats its ridiculous. He has rawhides (different flavors, brands, and animal antlers too), squeaker toys (stuffed toys, stuff less toys, and balls), balls (soft balls, baseballs, tennis balls, dog balls), rope toys (of different lengths, thicknesses, and knot numbers), a few kings, and a jolly ball for dogs! He learns quick, knows the basic commands down pat. We have 1.5 acres of unfenced land that he stays in our yard. On occasion he visits the lab and golden next door but all four of our dogs grew up together. He doesn't go in the street *knock on wood* either. I'm not sure where this is coming from. Hershey, my 2.5 year old lab was never destructive. Ammo chews shoes, the edge of the couch, he's shredded his dog bed, and my mom has this 36'' teddy bear that he's started shredding too. I have a feeling this is stemming from lack of stimulus. I'm now on summer break so I can do more with him and play more and I'm hoping this solves the problem. Have any of you guys had this issue, or is it perhaps a breed issue, with Great Danes and/or English Mastiffs? Thanks y'all!