Hello and welcome. This is just a short note to introduce myself or to request needed information for your problem. My name is ***** ***** I have been in the dog field for 25 years. I am a Therapy Dog & AKC Evaluator/trainer/ as well as an assistance/service dog trainer, specializing in behavior. It will be my pleasure to help you today.
He is at the adolescence stage where molars are affecting him and so is his age. This is not an age where they can be trusted to be left alone so keeping him with you is key and when you cannot watch him you need to crate him for his safety. He is also a breed that is known for chewing probably more than any other breed.
I would invest in toys that are interactive such as kongs, dog puzzles where you hide his food so he has to figure out how to get it., the more thinking toys you can get the better because usually thinking gets them tired. Kongs stuffed with plain yogurt , canned dog food , cream cheese, or peanut butter and frozen can keep an dog chewing appropriately. Ger many kongs and stuff them with different items as you leave for work put them out for him.
As for digging you want to teach the leave it command so you can give that when you see him digging. You can invest in a sandbox and hide toys and treats inside there so he learns to dig in the appropriate place. Get outside toys such as the wiggle giggle ball or treat dispensing balls to keep him occupied outside to curb digging.
It is very important that you interchange your toys so they always seem new just as you would rotate a child's toys or the dog ignores them.
Set up play dates with friends dogs to wear him out. Seek a neighborhood kid to come and walk or play with him.
start training him in basic obedience because again this uses the mind and will build good manners, eventually this will all stop but don't expect that for another year.
You can play calming music on your computer or invest in a CD to calm which should help with some relaxation.
Through a dogs ear
3 hours of dog calming music on youtube to try out
mind stimulating toys
talk to me treat ball
Kong these work great when stuffed with cream cheese and frozen
Dog Puzzles. If you just type in dog puzzles on amazon you will come to a page full. I just happened to pick this one . PetCo also carries dog puzzles.