Is your dog crate-trained? Have you taken the time to read some of the articles in this forum? Have you done your own researches prior to adopting your dog? If you have a puppy, you shouldn't leave a very young puppy alone for a long period of time, 4 hours max. If you can't take care of the dog, get a sitter to walk and feed the dog every 4 hours or so. Some breeds experience more separation anxiety than others, what do you have?