Do not reprimand a growl. A growl is not aggression; a growl is a warning that aggression is going to follow. It's basically saying "I'm not really comfortable with this, please stop." If a dog is discouraged from growling, she will eventually resort to biting without warning at all, which is even more dangerous than a dog that growls to let you know that she's not happy with what's going on.
I really wouldn't worry about this if I were you. She's only been around a week -- she's naturally wary, and possibly feeling quite vulnerable. She may always feel defensive when people wake her up or when she is startled by loud noises, but she will most likely get used to it as she settles in and is assured that this new environment poses no threat to her.
If she is sleeping and you (or anyone) are approaching, try whistling, saying her name or clapping your hands as you get nearer. It's not uncommon for dogs to instinctively snap if they are suddenly awoken. It's more biological predisposition than an issue with temperament.
I really wouldn't worry about this if I were you. She's only been around a week -- she's naturally wary, and possibly feeling quite vulnerable. She may always feel defensive when people wake her up or when she is startled by loud noises, but she will most likely get used to it as she settles in and is assured that this new environment poses no threat to her.
If she is sleeping and you (or anyone) are approaching, try whistling, saying her name or clapping your hands as you get nearer. It's not uncommon for dogs to instinctively snap if they are suddenly awoken. It's more biological predisposition than an issue with temperament.