Glossary

Resource guarding

A dog's tendency to protect food, toys, places or people from others by stiffening, growling, snapping or biting.

Also called: food guarding, possessive aggression, toy guarding, guarding behavior

Resource guarding is a natural behavior in which a dog tries to keep something it values. The dog may freeze, hover over the item, show teeth, growl, snap or bite. Common guarded items include food bowls, bones, toys, beds and sometimes a person.

It is normal for dogs but can be dangerous in a home, especially with children. A growl is a warning, and punishing it removes that warning without removing the worry, so the dog may skip straight to biting.

Prevention starts in puppyhood, by teaching that people approaching bring good things, such as tossing in an extra treat. For a dog that already guards, avoid confrontations and keep valuables out of reach. A veterinary behaviorist or qualified trainer can build a safe plan. A sudden change in guarding can signal pain, so mention it to a veterinarian.

Last reviewed November 8, 2026

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Related terms

Drop it A cue that asks a dog to let go of something in its mouth, taught as a trade rather than a struggle. Stress signals Small changes in behavior, such as panting without heat, yawning, shaking off or a tucked tail, that show a dog is uneasy. Bite inhibition A dog's learned ability to control the force of its mouth, which puppies normally acquire through play with littermates and people. Desensitization and counter-conditioning A training plan that exposes a dog to a fear trigger at a level it can handle while pairing it with something good, to change how the dog feels.