Resource Guarding in Dogs: Why the Label Misses the Real Cause
Resource guarding is aggression: a dog defending food, a space, or a person because he believes he outranks you. Why treating it one context at a time fails — and why fixing hierarchical status solves it globally.
What is "resource guarding"?
Resource guarding is defined as a natural, instinctive behavior where a dog becomes possessive or defensive over an item or space he perceives as valuable, trying to control or protect it from being taken away by people or other animals.
What's actually involved in "resource guarding" is the desire to possess or defend something. In each of these situations, the dog displays aggressiveness — either through threats or by physical escalation. In fact, it's precisely when the dog adopts these behaviors that the term "resource guarding" comes up and people seek to address it.
Why "resource guarding" is a misleading label
Long before "resource guarding" became popular, I was already working on this issue. I still work on it today, of course, but I don't call it "resource guarding" — I call it aggressiveness.
Why? Because the term "resource guarding" confines a behavior to a single specific area, whereas this behavior can neither be understood nor fundamentally resolved if we set aside its explanation and its underlying hierarchical foundation. The question isn't "Why is my dog resource guarding the sofa?" but rather "Why is my dog being aggressive?" By understanding the true purpose of aggressiveness in dogs as a whole, rather than within one isolated context, we can finally address the root cause.
In the beginning, mainstream professionals only spoke about "food resource guarding" or "territory resource guarding" — and more recently, "person resource guarding." It's as if they were gradually discovering new areas in which a dog can show aggression, whereas with a deeper understanding of canine aggressiveness, all of these areas should have been identified long ago.
Furthermore, "person guarding" remains very vague. What does it actually mean? Does the dog prevent someone from approaching another person because it relates to managing physical contact, sexual hierarchy, or something else entirely? Without addressing these underlying factors, the concept remains incomplete.
The true root cause: hierarchical status
In the section on aggression in my course's behavior problems module, you'll see that a dog's aggressiveness stems from several key triggers — namely food, territory, physical contact, and sexuality. And in the section on hierarchy, I explain that managing and controlling these exact four areas is what establishes a leader's status. And lo and behold — these are the exact same areas "resource guarding" relates to!
Whatever the specific context in which aggressiveness arises — food, space, or contact — I have been resolving these issues for 30 years by mastering these four fundamental pillars, rather than isolating each behavior as a brand-new phenomenon.
If someone contacts me saying, "My dog is resource guarding the sofa," I reframe it: "Your dog is aggressive when you approach the sofa because he believes he has the authority to defend a high-ranking position — in other words, he believes he holds a higher hierarchical status than you." My job then consists of helping the owner establish a higher hierarchical status than the dog, which resolves the issue globally.
However, if you focus solely on the sofa (the territory aspect) while your dog keeps holding power in other areas (food, physical contact, etc.), he may keep wanting to defend the sofa despite your efforts to correct that specific point. And even if he stopped defending the sofa while still holding power in other areas, his overall hierarchical status would be inconsistent — becoming a source of distress and anxiety for him.
I therefore never isolate an area in which a dog shows aggressiveness from the overall context.
The failure of modern, symptom-based training
When professionals work on resource guarding today, they do so within a very narrow context: only food, or only territory, and so on. By doing this, they don't address the true root cause of the problem (hierarchical status); they merely treat one of its symptoms (aggressive behavior) in one specific area.
Take a flat tire caused by a nail. If the mechanic only plugs the hole without removing the nail, the problem isn't fixed. Working strictly on food when dealing with food resource guarding is exactly like patching the hole while leaving the nail in the tire: the underlying problem remains. In a dog's case, even if focusing on food resolves the issue with food, another problem will pop up in a different area, because the true cause was never addressed.
Stephan MairesseProfessional dog trainer & canine behaviorist, 30 years of experience across 16 countries. Certificat de capacité N°750108. Read his full background →
Module 8 of the course covers reactivity, resource guarding, aggression toward people or other dogs, separation anxiety, fear, and more — step by step, filmed with real dogs.
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