If your dog seems to worry when you're heading out, destroys stuff when you leave the house, follows you from room to room when you're home, goes berserk when you come back and seems to be eyeing you suspiciously even before you leave—you may be dealing with a case of separation anxiety.
Dogs with separation anxiety exhibit distress and behavior problems when they're left alone. Some of the most common ways:
Digging and scratching at doors or windows attempting to reunite with their owners
Howling, barking and whining