Necessary Things for a House-Dog Owner to Know About Aggressive Behavior In Dogs and Cats

If you’re a house-dog owner, you know one thing: your furry friend loves to play. But what you may not know is that playing can sometimes be very aggressive for your pet. In fact, playing games can actually lead to aggressive behavior in dogs and cats. Here are some necessary things you need to know about aggressive behavior in dogs and cats when playing together.

Unfortunately, a certain percentage of dogs cats will display aggressive behavior toward their owners/caretakers or other humans. In the feline the aggressive mode may come upon the cat for unknown reasons. The cat will seem to be in a play mode, then the playing turns to more serious stalking, with ears held back and back arched, and often they will growl softly. You can see the fear/anger in their eyes. Or the behavior starts out while the cat is being gently stroked by the owner and the cat begins to become annoyed, then more defensive, then outright aggressive to the innocent owner.

Aggressive Behavior in Dogs and Cats

In the canine the fear/aggression occasionally seems to “come on out of the blue” but more often is triggered by getting into the dog’s “space” or protective territory. This unsocial behavior, while it may be “normal” if the dog or cat were interacting with another dog or cat to defend territory or signal “leave me alone”, can be dangerous to people. Cats in this fear/aggression mode will bite and scratch…sometimes really terrorizing the owners. And dogs, with eyes glazed, teeth bared and with fearful barking and growling, will back owners into a corner or up onto a kitchen counter!  In dogs this is often referred to as RAGE SYNDROME and can be a very shocking event for the owner (and I suspect, for the dog as well).
    The only way I know to defuse the aggression is to leave the pet’s area, just get out of eyesight. Trying to calm the dog or cat, or restraining and disciplining it will simply make the dog or cat even more fearful  and aggressive. What is the cause of this aggressive/anger state? It probably stems from very early personality/behavioral development experiences in the pet’s life. Events such as deliberate abuse, accidental trauma from objects falling on the pet, scary stimuli such as thunder and lightning, or other animals frightening the puppy or kitty may make a permanent impression on it regarding the world around it. More aggressive littermates can have detrimental effects, too.  The critical age range that these events permanently make their impressions generally is from about four to twelve weeks of age; whatever is programmed into the brain’s “personality structure”  during that time span will then be set for life.
As we all know, there are humans with personality disorders…and outright sociopaths who are a danger to others…and so it is in the dog and cat world. And as difficult as it is to “pacify” the behavior of maladjusted humans who have the benefit of counseling, therapy and medications, and the love and sympathy of family and friends, much more so is the difficulty in modifying the behavior of dogs and cats who pose a threat to their caretakers. Lets face it, these dogs and cats cannot help being who they are; their impressions of the world have been shaped by events not of their choosing. (Can we say the same for human behavior?) Nevertheless when living and closely interacting with humans (and innocent children) daily, any behavior that endangers human health and safety is unacceptable.

consultation with a professional animal behaviorist

My experience during thirty years of working with dogs and cats has taught me that many well intentioned people, certain that their gentle and loving ways will modify the behavior of the fearful/aggressive dog or cat, have learned a hard lesson in animal behavior. Often the “saviors” of these animals have been injured and even psychologically harmed when they learn that all their love and understanding will not correct the aggressive animal’s behavior.

    I am not saying that all cats and dogs with fear/aggression are lost causes; I am saying that a great percentage of them will continue to be a danger to human health and safety no matter who or what attempts to modify the behavior.
    So…what is an owner to do? Consult with your DVM, breeders, and animal shelter personnel about your particular dog or cat, maybe even spend a little money on consultation with a professional animal behaviorist about your pet. If you choose to keep the pet and attempt behavior modification, be prepared for the experience to dominate your entire home life. Every family member will have to contribute to the plan of action and it will be a 24 hour-a-day experience; that dog or cat will be the focal point of your thoughts and activities. Are you willing to do that? Should you do that?  I have witnessed many sincere and vigorous attempts to modify fear/aggressive behavior in dogs and cats that have left the animal’s caretakers frustrated, demoralized and injured in their failed attempts to pacify the pet.
    At the heart of the problem is the fact that the animal CAN’T HELP being who it is!  It can’t reason that the owners do not represent a threat or that the stimulus triggering the fear/aggression is not a real danger …it simply acts and responds as ordered to by a brain that was imprinted with certain directions that the animal will never be able to modify.

Triggering Pain or Discomfort

Many, many times I have been a part of counseling owners about this fear/aggression problem.  If we can rule out and are certain that the animal does not have anything physically wrong that may be triggering pain or discomfort, such as bladder stones, gastrointestinal foreign bodies, tumors or infections, and we are certain that the behavior is personality based, the choice may be to euthanize the unfortunate pet. Even if the pet is “OK most of the time” and only a threat two per cent of the time…is that an acceptable risk for the family to take? If the cat only scratches someone’s eye occasionally or only bites severely once in a while, is that acceptable? If the dog only attacks “certain” people or gets frightened only by small children necessitating the continuous separation of small children from the dog…is that an acceptable risk to have living in your home all the time?
    Regrettably, I have seen far too many empathetic and sincerely-intentioned pet owners make excuses for their dog or cat’s harmful behavior.  I have seen children scarred from dog bites that have occurred well after the dog has bitten the child or others in the past.  Some pet owners really go too far in excusing the dangerous behavior of their dog or cat, blaming everything but the dog or cat, and these owners fail to see the improper and dangerous priorities they have set. In the case of a dog or cat being a real threat to human safety, you must set aside emotional attachment and look at the situation objectively.  You must ask “No matter how much I love this animal, is it a danger to human health?  Am I, as the caretaker and person responsible for this animal, willing to gamble that it won’t ever tear out someone’s eye, bite off someone’s nose, scar someone’s face…or even worse?” YOU be the judge…and then YOU live with the consequences of your choices.

Danger to Human Health


I have had entire families come with their pet to my animal hospital where everyone is crying and completely emotionally drained by the absolute necessity of euthanizing their pet simply because the dog or cat has demonstrated itself to be a danger to them and others. NOBODY wins in these situations…not the family members, not the pet, not the veterinarian. Simply put, the animal cannot help being who it is. Unfortunately, who it is can be a danger to human health.  It’s a NO WIN situation for all involved
    And to give away a pet with fear/aggression personality traits to someone else is NOT a solution. The innate tendencies of the animal evolved from genetic predispositions and early brain/sensory imputs. YOU can’t help that and neither can the dog or cat.

Owning a house-dog is a rewarding experience, but it comes with some responsibilities. One of the most important ones is to be aware of aggressive behavior in dogs and cats. This behavior can range from growling, biting, and scratching to full-blown aggression. If you’re ever worried about your pet’s safety, or if you notice any signs of aggression, it’s important to consult a vet or animal behavior specialist. In the meantime, here are some things you should know about aggressive behavior in dogs and cats:

Frequently Asked Questions

Can an Aggressive behavior in dogs be cured?

Aggressive behavior in dogs can’t always be completely cured. In many cases, the only way to manage the problem is to limit a dog’s exposure to the things, situations and people that trigger her aggression.

What causes fear aggression dogs?

Interactions with people or other animals are common scenarios. Both familiar and strange humans can make a dog afraid and aggressive, especially if they are invading their personal space.

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