That's not to say that dogs can't be flexible, but it is to say that they can't take care of themselves. You need to be responsible not only for yourself, but for the health, life, and happiness of your dog. You have to be able to keep your dog inside when you're not home. Please keep your dog inside. Think like a dog.
Dogs are omnivores.
They're only dogs. Dogs are also intelligent beings. They need stimulation and attention. If they're bored, they'll let you know, often by chewing, barking, or other unwanted behavior. Make time to spend with your dog.