12 Ways Dog Aggression is Like Cancer
Is your dog aggressive to people and/or other dogs? You’re not alone. It’s the most common serious behavior issue I see in dogs. Dog owners react differently to their dog’s aggression.
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Learn the signs of separation anxiety in dogs, how to tell it from boredom, and the practical, humane steps that can help your dog feel safer alone.
Does your dog bark and lunge at other dogs on walks? Learn why this behavior happens, what it really means, common mistakes to avoid, and how behavior modification can help.
A true story about a loving dog owner named Tim, a rescue dog named Buddy that repeatedly bit him, and the surprising discovery that changed everything. Learn why understanding canine body language can prevent bites and strengthen your relationship with your dog.
Why do some dogs with aggression, fear, anxiety, and reactivity improve while others struggle? Dog behaviorist Scott Sheaffer explains the four owner-related factors that strongly predict success in difficult canine behavior cases.
Why do some dogs become aggressive? Learn the real causes behind aggression, including fear, anxiety, pain, frustration, genetics, and learned behavior.
Most dog behavior issues aren’t obedience problems; they’re misunderstood dog behavioral patterns. Learn what you’re missing and how it affects your dog’s behavior.
Some common dog training advice sounds right—but actually makes behavior worse. Learn the 3 biggest mistakes and what to do instead.
Discover how Dogosterone and canine HRT can resolve fear-based behavior, anxiety, and mobility issues in neutered male dogs. Is your dog hormonally imbalanced?
Dog owners often unintentionally cue fear and aggression in their dogs. Learn how subtle human behaviors can trigger reactivity—and what to do instead.
Discover six rare and often misunderstood types of dog aggression, including sleep startle, redirected aggression, and predatory behavior toward humans. Learn why professional help is critical.
Do dogs go to heaven? A pan-religious look at what Christianity, Islam, Judaism, and Eastern traditions say about pets and the afterlife, plus personal reflections on grief, the Rainbow Bridge, and the book Dog Heaven by Cynthia Rylant.
Discover five common dog-owner habits that create stress, confusion, and behavior problems, plus humane, practical ways to help your dog succeed.
Learn the signs of separation anxiety in dogs, how to tell it from boredom, and the practical, humane steps that can help your dog feel safer alone.
Does your dog bark and lunge at other dogs on walks? Learn why this behavior happens, what it really means, common mistakes to avoid, and how behavior modification can help.
A true story about a loving dog owner named Tim, a rescue dog named Buddy that repeatedly bit him, and the surprising discovery that changed everything. Learn why understanding canine body language can prevent bites and strengthen your relationship with your dog.
Why do some dogs with aggression, fear, anxiety, and reactivity improve while others struggle? Dog behaviorist Scott Sheaffer explains the four owner-related factors that strongly predict success in difficult canine behavior cases.
Why do some dogs become aggressive? Learn the real causes behind aggression, including fear, anxiety, pain, frustration, genetics, and learned behavior.
Most dog behavior issues aren’t obedience problems; they’re misunderstood dog behavioral patterns. Learn what you’re missing and how it affects your dog’s behavior.
Some common dog training advice sounds right—but actually makes behavior worse. Learn the 3 biggest mistakes and what to do instead.
Discover how Dogosterone and canine HRT can resolve fear-based behavior, anxiety, and mobility issues in neutered male dogs. Is your dog hormonally imbalanced?
Dog owners often unintentionally cue fear and aggression in their dogs. Learn how subtle human behaviors can trigger reactivity—and what to do instead.
Discover six rare and often misunderstood types of dog aggression, including sleep startle, redirected aggression, and predatory behavior toward humans. Learn why professional help is critical.
Do dogs go to heaven? A pan-religious look at what Christianity, Islam, Judaism, and Eastern traditions say about pets and the afterlife, plus personal reflections on grief, the Rainbow Bridge, and the book Dog Heaven by Cynthia Rylant.
Do dogs know when another dog dies? Learn how dogs perceive death, why they react differently, and how to help surviving dogs adjust after a loss.
Uncover the truth behind dog aggression. Learn why barking, lunging, or snapping is a symptom of fear, not a "mean" personality. Discover the 7 common types of dog aggression and how understanding triggers leads to effective behavior modification, not just labeling.
Worried about your dog and new baby? Discover the reassuring truth: dogs rarely see babies as prey. Learn the key safety periods, how dogs truly perceive infants, and actionable steps for a harmonious home.
Standard dog training often worsens fear and anxiety in sensitive dogs. Learn why obedience-based methods fail anxious dogs—and what actually helps.
Is your dog bored or anxious? Learn why 'giving your dog a job' is the key to channeling natural instincts, stopping bad behavior, and creating a happier, more fulfilled canine companion. Practical tips inside.
Bringing home a new dog is exciting, but first-time owners often discover the learning curve is steeper than they expected. After working with hundreds of families, I’ve noticed I approach first-time owners very differently than experienced ones — not because they aren’t intelligent, lack commitment or care, but because they’re working from assumptions that just don’t match how dogs actually learn.
We’ve all seen them—the modern “training” collars that promise a quick fix for all kinds of dog behavior problems. These collars are really just old-school shock collars (also called e-collars) with a built-in buzzer. While the electric shock function is increasingly recognized as aversive and inhumane, many well-intentioned dog owners are drawn to the “buzzer” or “vibration-only” mode. It seems like such a harmless beep or gentle nudge, a simple way to get your dog’s attention.
Barking is one of the most natural things a dog can do—but when it becomes constant in the backyard, it can strain relationships with neighbors and even cause stress for the dog. The key is to understand why your dog is barking and then take steps to make things quieter and calmer for everyone.
Here are eight ways to stop your dog’s backyard barking:
You’ve seen it a hundred times: one minute, your dog is a perfect angel. The next, they’re a blur of fur, tearing laps around the coffee table, skidding across the floor with a wild look in their eyes. It’s a scene of pure, unbridled chaos… and it’s completely normal.
Aggression is the number-one reason dog owners reach out to me. It’s also one of the most emotionally charged and misunderstood behavior problems. When someone says, “My dog bit me,” or “My dog bit someone,” fear and frustration often take over—and myths quickly fill the gaps where knowledge is missing.
People often ask me, “Scott, what’s the number one thing I should pay attention to in my dog’s behavior?” It’s a fair question. As dog owners, we’re told to keep up with diet, exercise, training, socialization, enrichment, vet visits, and the list goes on and on. All of that matters.
When people ask me, “Who makes the best dog owner?” they usually expect me to name a type of person. Maybe someone who works from home or someone with a big fenced yard. Maybe they’re thinking about people who had dogs as kids and grew up knowing all the basics.
But the truth is, none of those things guarantee success. I’ve seen dogs thrive in apartments and struggle in sprawling houses with massive backyards. I’ve met first-time dog owners who completely turned a difficult case around, and I’ve seen seasoned dog people miss the mark.
When a dog shows aggression, it’s natural to want the problem solved quickly. Many owners, hoping for a fresh start, turn to “board and train” programs—where a dog lives at a training facility for days or weeks, receiving daily sessions with a trainer.
It sounds ideal: the trainer “fixes” the problem while you go about life, and you get your dog back transformed. Unfortunately, for aggression cases, the reality can be far more complicated—and in some cases, harmful.
I want to talk about something a lot of dog owners overlook, but it can make a huge difference in housetraining and behavior issues—properly cleaning up dog accidents. Whether you're dealing with a young puppy or a dog who’s marking in the house, the way you clean up after them matters more than most people realize.
Why Scent Matters More Than the Mess
When dogs eliminate inside, it’s not just an accident; it’s communication. Dogs use scent the way we use text messages. Whether urine or feces, it leaves a calling card: “Hey, this is a place where I go.” And if that message doesn’t get fully erased, your dog might keep going back and “resending” that message.
Deciding to euthanize a dog for behavior reasons is one of the most painful choices a dog owner can face. Unlike terminal illness, where the outcome is clear, behavioral euthanasia involves weighing quality of life, safety risks, and ethical responsibility.
As a dog behavior expert, I’ve seen cases where euthanasia was the last—but kindest—option. Let’s discuss when it might be appropriate and how to navigate this emotional and difficult decision.
Cesar Millan, it’s time to apologize to dogs. For years, you’ve pushed these four myths, and now, science is calling for a reckoning.
If you’ve ever watched The Dog Whisperer, you’ve seen Cesar Millan in action, calmly walking a pack of dogs, correcting bad behavior with a sharp "tsst," and preaching about "dominance" and "being the pack leader." His methods look effective on TV, but here’s the problem: most of what he promotes isn’t backed by modern dog behavior science. In fact, some of it is downright harmful.
We all think we know what punishment looks like when it comes to dogs. Ask most people, and they’ll say, “Oh yeah, that’s stuff like hitting, spanking, shock collars, jerking the leash, or prong collars.” And yes, those are all forms of punishment—but they’re not the whole story.
Aggression in dogs is a complex behavior that normally stems from fear rather than inherent hostility. Understanding the root cause of aggression is crucial for effective management and rehabilitation.
Fear is the primary driver of aggressive behavior in dogs. When a dog perceives a threat—be it a person, another dog, or an unfamiliar object—it may react aggressively to protect itself.
About ScottScott Sheaffer, CBCC-KA, CDBC, CPDT-KA, is a certified canine behavior consultant specializing in the assessment of serious canine behavior problems. Learn More |
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Is your dog aggressive to people and/or other dogs? You’re not alone. It’s the most common serious behavior issue I see in dogs. Dog owners react differently to their dog’s aggression.
Read MoreYou wear that special t-shirt when watching your favorite sports team play; you’ve found that if you don’t, they lose. This is known as superstitious behavior and we all do it. Sometimes we do it intentionally, and sometimes we do it unconsciously.
Read MoreYou’ve probably read numerous stories about what breeds of dogs are most frequently involved in bites to people. Let’s flip that around and see who is most likely to turn up at the hospital with a dog bite wound. Before reading any further, remember that any dog can bite anyone at any time.
Read MoreThis is a question I am asked almost every day. An owner’s dog will lunge and bark at dogs when he is on-leash, yet seems to enjoy being around other dogs while off-leash at a dog park. There are three main components in answering this question: root cause, physical environment and response. I’m going to address these three elements individually.
Read MoreI’m going to reveal a secret technique (well, not so secret anymore I guess) that I use when I evaluate dogs with behavior issues. That technique is a question I ask the dog’s owner as part of my assessment, “How do you discipline your dog?”
Read MoreThe AKC (American Kennel Club) lists the 10 breeds shown below as America’s current most popular dog breeds. Do you notice something interesting about this list?
Read MoreDo you always take your own advice? Of course you don’t and neither do many dog trainers and behavior consultants. Below is a list of things that many dog professionals frequently do with their own dogs that they might not necessarily advise their clients to do.
Read MoreWe’ve all heard the proverb, “Before you abuse, criticize or accuse a man, walk a mile in his moccasins.” If you are ever inclined to question the folks who run our municipal animal shelters because they sometimes have to euthanize dogs, please consider the following.
Read MoreIn the hierarchy of problematic dog behaviors, certainly dogs biting humans is at the top. Let’s define “dog bite” before we go any further. There is a misbelief that a dog bite is not really a dog bite until there is serious injury. The reality is that anytime a dog’s teeth come in contact with a human as an act of aggression, it is considered a bite.
Read MoreFrom 1924 - 1932 experiments were conducted on humans at a Western Electric factory (Hawthorne Works) near Chicago. Henry A. Landsberger coined a term, "Hawthorne effect", that summarized his findings from these experiments.
Read MoreThe following is an email I received that is representative of situations I commonly see when owners may not fully understand the seriousness of their dog’s aggression. The names have been changed.
Read MoreOur dogs do things sometimes that we find crazy and embarrassing. You'll probably find some of your dog's odd habits in the list below of unusual, but common, dog behaviors. They may be weird to us, but they’re normal for dogs.
Read MoreDo dogs instinctively protect their owners? In this short video, Scott Sheaffer, CDBC, CPDT-KA, will provide some answers that may surprise you.
Read MoreI hear some form of the following almost every day, “I’m not worried about my dog biting children; there is no reason to teach my kids about dog safety.” The reality is that the majority of dog bites to young children are from known dogs, e.g., the family dog and neighborhood dogs.
Read MoreExercising your dog is important. Increased exercise for a client’s dog is one of my most frequent recommendations as part of a treatment plan for problem behaviors. There are many misconceptions about how to properly exercise a dog. Below I’ve provided some things to consider when exercising your four-legged friend.
Read MoreDogs provide information about their emotional state through their tails. While happy dogs may wag their tails, sometimes wagging can mean something else. A wagging tail generally indicates happiness with the exception of flagging.
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Discover five common dog-owner habits that create stress, confusion, and behavior problems, plus humane, practical ways to help your dog succeed.