Help! How Do I Deal With a Territorial Dog? (Vet Answered)
This question has been answered by a vet
Veterinarian & Animal Behaviorist
With nearly two decades in veterinary medicine, Dr. Paola brings hands-on experience across multiple species. A graduate of the University of Guadalajara, she specializes in preventive care, animal welfare, and positive reinforcement training.
The Question
“My sister has a Shi-Poo dog, Luna. She’s 6 years old and has always been territorial and bites. I’m tired of my sister never having taught her pup to do anything. She works all day, and her kids have left for college. The dog is fine for about 15 minutes when being petted. Then it snaps and bites and attacks. How do I get it to stop since I don’t see the dog often, but my sister refuses to do anything about it? “ – Cassandra
Quick Info about Luna
Hi Cassandra,
I can hear your frustration, and it’s completely valid. Living with or even occasionally interacting with a dog that bites can be not only unpleasant but dangerous, especially when the behavior feels preventable. Luna’s age, breed mix, and history all play a role in her current behavior, but what you are describing sounds more like she’s showing signs of stress, tactile sensitivity, or overstimulation rather than true aggression. Dogs that “snap” after a few minutes of petting or when petting a certain area are often sending subtle signs that they’ve had enough, or they are in pain. But if those signs go unnoticed, they escalate to biting as a last resort to make the interaction stop.
Since Luna doesn’t live with you and your sister isn’t taking action, your options are a bit limited, but you can still protect yourself and possibly improve her behavior gradually. Try to avoid any prolonged petting or close contact unless the dog initiates and clearly seeks it. It is important to make an effort to respect the boundaries by understanding her precursor signs. Watch for signs like turning the head away, lip licking, yawning, or a stiffened body. These are Luna’s polite ways of saying “I need space.” If you can, stop petting her and move slightly away to allow her to calm down, then redirect her focus onto something else that she enjoys. She will learn that you are able to respect her limits; you can also reward calm behavior without physical contact.
It’s also worth mentioning that for her behavior to change, everyone in the family should be on the same boat and treat her the same way. You might want to have a chat with your sister and point out that Luna’s behavior could worsen over time, and this kind of biting can result in serious injury or legal issues, especially if it happens to a visitor or child. Sometimes, a gentle reminder of the potential consequences is the nudge someone needs to seek help.
This kind of case may benefit from a remote consultation with one of our certified veterinarians at Pangovet. They can guide your sister and provide a plan that works around her schedule. While you may not be able to train Luna yourself, encouraging small changes and showing them how to enjoy respectful interactions can influence your sister and set a safer example for others who visit. Thanks for reaching out!
– Dr. Paola