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My dog growls with bones. Is it resource guarding? What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 1 year and 3 months old | 40 lbs

Our mixed Border Collie/Australia Shepard that is year and half old. He has started to growl at us when he is chewing on a bone treat if we come close he thinks we are trying to take it away from him. Should we scold him and why is he acting this way.

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 4th, 2019

Hi there. Many dogs will freeze and growl, snarl, or snap if they have something valuable (like a bone or bully stick) and they're afraid you might take it away. This is actually quite a normal behavior for dogs, and is just their way of trying to protect their stuff :) To help Sam learn that you're not a threat, you can try walking by and casually tossing him a treat occasionally while he's chewing on his bone. This way, he learns that good things happen when you approach - so no need to growl! NEVER reprimand him for growling, and never try to forcibly take the bone away, as this will only teach him that he was right to be wary of you approaching and is likely to make the problem worse. If you want more detailed information about how to work on this problem, I highly recommend the book "Mine!" by Jean Donaldson.

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    Answered By Rodrigo Roca, DVM

    Veterinarian

    Published on December 12th, 2017

    Hello, sorry to hear about Aries. It sounds like the bones and toys may be inciting his aggression. A main objective in preventing this behavior is to avoid the trigger. I would thus recommend not having any access to these kinds of toys in an attempt to avoid giving him a trigger for his aggression. If this does not help then you may need to have further training to modify the behavior. The follow relates to some things you may be able to try at home in order to modify this behavior. Hope this helps and best of luck. Aggression is a common problem faced by many dog owners. It is commonly misunderstood to be based in dominance. In actuality, there are various reasons that dogs can react aggressively. Most commonly these acts are based in fear or anxiety. This handout, will attempt to help you differentiate whether your dog’s aggression is based in dominance or another stimulus, like fear or possession. However it is not meant to replace visits and discussions with your veterinarian. Common types of aggression • Fear aggression: Many commonplace human behaviors are threatening gestures to dogs, but their reactions are often times very subtle and easily missed by most people. Anything that can cause your dog to feel distressed or uneasy can illicit an aggressive reaction. Such things include: sustained eye contact, pressure over the top of the head, lifting the dog, bending over the top of a dog, certain force-based training techniques, or trying to take something of high value away from the dog. • Territorial aggression: Dogs can react aggressively when a person comes into an area that it regards as its home. There is often a basis of anxiety in dogs that have territorial aggression. • Possessive aggression: When aggression is directed toward a person that the dog views is approaching something of high value (food, toys, family members). • Redirected aggression: When the dog is frustrated by the inability to reach an object or person that elicits its aggression and instead acts aggressively toward a person that is within reach. • Dominance aggression: True dominance aggression is very rare. Most often aggressive acts are based out of another type of motivation. Usually what is assumed to be dominance aggression is actually based out of fear or anxiety. What is your dog’s motivation for its aggression? It is important to watch the body posture of your dog during a time of aggression to determine the underlying emotional state of the dog causing the aggression. Here are some examples of what to look for: Fearful or submissive postures • Avoiding eye contact • Lowered head and tail • Tense body posture • Ears to the side, back or down • Horizontal lip retraction • Licking lips • Yawning • Crouched body posture • Moving slowly or freezing • Submissive urination Dominant postures • Sustained eye contact • Ears erect and forward • Vertical lip retraction • Forward-leaning body posture

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