Does your dog growl or snap at others when he is around food or favored objects? It might be possession aggression. Dog aggression can be a serious problem for dog owners. In order to prevent or change aggressive behavior in dogs, it's important to know exactly what is causing the aggression. The following will help you determine if you're dealing with possession aggression:
Overview of Possession Aggression
Possession aggression in dogs is also sometimes referred to as food aggression or resource guarding.
In cases of possession aggression, dogs growl, snap, or bite in order to protect a resource (food, toys, etc.) from being taken away by another dog or person. It's your dog's way of saying, "Back off! This is mine!"
Keep in mind that what your dog considers an object worthy of possessing may not be something you think has any value. For instance, some dogs are just as likely to snarl and snap over a tissue they fished out of the trash can as a big meaty bone.
Causes of Possession Aggression
Often, possession aggression in dogs is genetic. Some dogs are just born with a genetic inclination to protect their food, toys, or other objects. Even puppies as young as a few weeks old have been observed growling over a food bowl.
Some dogs may learn to be aggressive in situations where they feel there is competition over resources. For instance, a single dog in a household may never show signs of possession aggression, but if you add another dog, there may be squabbles over toys or food bowls.
It's not uncommon for dogs who spend a long time in an animal shelter to develop a problem with possession aggression because they perceive the other dogs as competition for a limited number of resources.
Signs of Possession Aggression in Dogs
- Dog growls when a person or another animal approaches his food bowl.
- Dog growls, snaps, or bites when someone tries to take away a toy or bone.
- Dog fights with other dogs over bones, toys, or food.
- Dog's body stiffens or shows other signs he may bite when people or other animals approach while he's eating or playing with a toy or bone.
Degree of Dog Aggression
Different dogs can display different degrees of aggression. Some dogs may only show aggression over one specific object and nothing else. For instance, some dogs may not care if people or other animals approach him while he's eating or playing with a toy, but snap or growl if someone approaches him while he's chewing on a pig's ear. Other dogs, however, may display aggression over anything he finds around the house: food, bones, toys, children's toys, tissues, etc.
There is also a difference in the way in which dog's display aggression. Some dogs never do more than curl a lip or give a small growl, while other dogs may give serious bites to someone who approaches while they eat.
It's also possible for aggression to escalate over time. A dog may start off with a small growl over his food bowl, but if his warnings are ignored, he may resort to biting to protect the things he thinks of as his.
How to Deal With Possession Aggression in Dogs
The worst thing you can do is to force your dog to give up the item he is protecting. You could get injured and your dog will learn nothing. It's better to find a way to convince your dog that giving up the item means something good will happen.
Try introducing something your dog may find more valuable, like a special treat or a new toy. If your dog is holding the item he is guarding, you can use the "drop it" cue to get your dog to give up the item. Just make sure you have a valuable reward! After your dog stops guarding and gets the other reward, you can let him have the item he was guarding back. Repeat the exercise often, each time your dog is resource guarding. Over time, he will hopefully learn that there is no need to protect his stuff.
If your dog is actually trying to bite, you must be very cautious!
If you are not seeing improvement on your own, or if your dog's aggression is getting worse, consider getting help from a dog trainer or behaviorist to correct your dog's behavior.
Edited by Jenna Stregowski, RVT