If you have your dog that whines and barks once you leave, also poses destructive and hard behavior, he probably has pet separation anxiety. It's a really common affliction however it needs to be managed quickly and efficiently as it could worsen quickly and eventually become harder to take care of.
DOG SEPARATION ANXIETY is about the level of your pet's stress when you move out and leave him alone. Dogs are very social animals and want to be a part of a pack. Naturally, the dog wishes to be part of its owner and other members of its family on a regular basis.
When the dog is left alone it doesn't understand why the other members of its"pack" aren't there. This induces stress that canine cannot express in a good manner so that it comes out as destructive and antisocial behavior.
Dog separation anxiety is best handled in dogs however if the dog is fully grown it may be treated efficiently. In fact, the problem may only arise when the dog is fully grown, perhaps because of a shift of owner or even a big change in the owner's lifestyle.
This is a specific problem for a dog that has been used to constant provide and attention and this suddenly varies. So thinking ahead is very important. If you know a big change is coming then you should prepare your dog because of it.
A very effective method is to practice leaving regularly at different times of their day even when you are not going out. Get ready to venture outside, stay out for five minutes or so, and then go back. Your dog can get used to you personally and return again. Then you can increase the amount of time you stay out without your pet becoming worried.