Resource Guarding Appears "Out of the Blue"
Even among carefully selected and raised service dogs, resource guarding may appear in a dog that has never previously demonstrated it.
If the resource guarding behavior is 'appearing out of the blue' at around 6 mos to 16 mos, you may be dealing with a fear period or adolescent hormones. The larger the breed, the later adolescence sets in and the longer it lasts.
Resource Guarding is most commonly species specific. This means that he will typically only guard against other dogs, not humans or vice versa. Just because your dog resource guards again other dogs doesn't not mean he will do it against people Just because he resource guards against people, does not mean he will do it against other dogs. The most important thing is that he is safe in public. If he is not, remove him from public access training or work immediately.If your dog resource guards in both situations, it may be an indicator of his underlying temperament. Look at other aspects of his life. Does he show fear or mistrust in other ways? Where does he lack confidence? Is he a bully? Dogs that are bullies are typically fearful dogs that were not properly socialized. They may have had a buddy who was too over the top for them and they adapted by becoming pushy themselves. Just like in humans, bullying is an indicator of lack of control and fear.
Resource guarding could also be a result his training history. Even if you think you are not using confrontation-based training methods, your dog may see it differently.
Each dog has his own tolerance level for force and emotional pressure and each copes with it differently. This is a common reason I see for the mistrust seen in resource guarding. In past situations, you may have inadvertently used emotional or physical force and your dog has legitimate reason not to trust you. Confrontational methods may lead to resource guarding as the dog learns he cannot trust you with things that are important to him. Unfortunately using violence in training, often gets violence in return.
An altercation with another dog over his toys or food may affect future interactions with that specific dog or be generalized to react when the next strange dog that approaches when he has a toy. Generalizing to other dogs is more common in dogs that have had limited or poor dog to dog socialization during the critical socialization period when he was 5 to 12 weeks old. This is because they have very few positive interactions to draw from to overcome one negative interaction. Science tells us that negative experiences have much more influence than positive experiences as a survival mechanism.
Consult a positive dog training professional or veterinary behaviorist for their help and assessment. Look long and hard at his over all behaviors. Is he fearful? How is he responding to training? You do not want your service dog to be a liability to you in public. If he has underlying fears or mistrust, he may not be a good service dog candidate and may need to be removed from training as a service dog. What you want to do is avoid a confrontation with your dog at all costs. Putting in that situation allows him to practice the unwanted behavior. Practice makes perfect. If you back away when he does react, he is reinforced for growling (or worse). If you force him to give up his item, he learns he can't trust you and it further undermines his trust in you.
1. Observe Your Dog
Watch for situations that trigger the resource guarding behaviors.
What exactly are the things the dog guards?
Against who does he guard them?
What specific behaviors do you see and when do they occur?
Early warnings are the dog asking for distance. He might look away, turn his eyes away (called whale eye) or turn his head away as you approach. He might do a big yawn. He might lick nose tip. This one most people miss as it happens so quickly. He may paw the object or move closer to it. Watch your dog when he is with his food dish or higher value toys.
The end stage behaviors are the dog freezing (get still) and his eyes get 'hard" and glaring. If the dog is doing this, the dog has escalated his behavior from the early signs and you may hear growls. This is the dog telling you (or the other dog) that he is willing to escalate his behavior further to air snapping or biting to protect the resource. If the dog has been punished for growling previously, he may just freeze and then bite. Punishment to a dog might just be you verbally chastising him "Don't you do that." in a lowered tone.
What age was the dog when you first noticed it?
2. Once you have determined the things your dog resource guards against and what he doesn't, start with things that are lower value than those. In a situation such as on his dog bed where he has resource guarded in the past, give your dog a lower value toy or treat than he has ever shown RG for. If needed, start with an object that the dog has not interacted with before like a piece of wooden dowel or a plastic tube. Starting this process with a lower value item teaches the dog how to play the game and what he can expect later.
If there are children or mentally incapacitated adults involved, make sure they are not involved in the process and removed form the room while you train. This helps to give the dog one less thing to worry about and keeps them safe until it is time to bring them into the process. Prepare your treats: choose medium value treats (commercial treats are fine like Rollover or Zukes) and make sure that the treats are hidden in a pocket or treat pouch out of sight before you bring them out.
Start by giving to dog the item, then back outside the dog's personal space for a few seconds. Now take a small step into your dog's space and toss a treat right near his mouth and take a step back. Repeat for several sets of 10 repetitions until your dog is looking eagerly up at you anticipating that your moving towards him (while he has the item) means more treats are coming. When that happens, you can decrease your distance from your dog by stepping a little closer in, toss the treat and pick up the toy, the drop it again. Step away. Once you can get closer you can lean in, drop the treat and lean out. Repeat several times until again the dog is looking forward to your approach and you taking the time away.
Next step is to step in, toss a treat, and while he is eating take the toy away, toss another treat and step away. This step teaches the dog that even when the toy is removed, something good will come in its place.
3. Next, increase in the value of the item, and repeat the process but use high value food treats (any kind of REAL meat, not commercially made treats-cooked beef, pork, chicken, lamb, turkey-I use heart, tongue or roast) instead. Make sure that the treats are hidden out of sight in a pocket or treat pouch before they appear.
Since you know the dog resource guards this object, you will need to add more distance away from the dog to start and progress forward much more slowly. Wait for body language that tells you he is looking forward to you moving towards him with the treat. It may take several sessions to be able to progress to where you can get close enough to touch the item. Taking it away may be many more. If it seems to e taking too long, or your dog's behavior is getting worse, not better, then consult a qualified positive trainer or veterinarian behaviorist for help. Take each step slowly and do many repetitions. Repeat the 3 step process process with many different high value items.
4. Now repeat the process right step 1 to 3 in many different locations. You want to make sure the dog has generalized the behavior (can do it) in many different locations and situations. Always err on the side of caution. Protect children and the public when possible. Remember that you are ultimately liable for the behavior of your dog.
Periodically in your training review the process to make sure the behavior stays fresh in your dogs mind. This step is called maintenance so your dog can remember how to do it even years after he learned it. This will help to keep you and the public safe.