OK, you are trying to get him exercised, that's good!

It does sound like he hasn't quite got the idea about potty training. Try getting some spray cleaner WITH ENZYMES in the pet section of Walmart or any pet store. It should be specifically for urine cleanups and say it will erase the smell of his own urine, which may attract him to the spot again. Even if you can't smell it, he can. Then keep taking him out on a regular schedule and praising him for doing his business outside.

I'm not sure what you mean by leaving them out all day? Out of the crate or outside? If you can puppy proof one room and secure it, he shouldn't have to spend the day in a crate. We stopped using the crate completely at about 10 weeks of age in a puppy proof house. We never used it when we were home.

If you mean leaving him outside, well, being tied all day would be awfully unhappy for him wouldn't it? Plus the weather and other animals are also problems.

Did you try putting something yummy inside the kongs? If you do and freeze them they last a long time for chewing. The kind I am talking about is not a ball, but kind of snowman shaped and hollow.

Obedience training was also mentioned, this may help to occupy his mind a bit and give you something to do with him in the house.

I don't know if you like to bike, but there is a great contraption called a "Bikerdog" that you attach to you bike and to the dog by a harness. Your hands are free and the dog is very secure and cannot pull you over. We use it all the time for our very hyper 12 mo. old pup, Bonnie. It will tire out the dog, but of course you have to use common sense about how fast to go. It is sold on the internet at bikerdog.com. It costs $50 but has been worth it's weight in gold to us becasue she likes to run, run, run!

Hang in there with Gunner. It may be a while yet before he settles down, but lots chew toys will help. Have you tried the animal hooves available in pet stores for dogs to chew? Bon loves those.