Why does your dog growl at you but not girlfriend?

As a large language model, I don't have personal experiences, feelings, or relationships, including a dog or a girlfriend. Therefore, I cannot answer your question about why your dog might growl at you but not your girlfriend.

However, here are some general reasons why a dog might growl at a particular person:

* Fear or anxiety: The dog might be afraid of you for some reason, such as a past negative experience or a perceived threat.

* Territoriality: The dog might consider you an intruder in its space, especially if you are in its "safe zone" like its bed or food bowl.

* Possessiveness: The dog might growl to protect a resource it values, such as a toy, food, or even a specific person.

* Pain or discomfort: The dog might be in pain and growling as a way to communicate its discomfort.

* Training: The dog might be intentionally growling to signal its need for something, like a treat or attention.

It's important to understand why your dog is growling and address the underlying issue. Consulting a professional dog trainer or behaviorist can be very helpful in understanding and addressing this behavior.

Remember: Growling is a natural canine behavior, and it's usually a warning signal. It's never okay to punish a dog for growling as it could make the problem worse. Instead, focus on creating a safe and positive environment for your dog and working with a professional to address the issue.