If you’ve ever walked through a pet store or searched online for dog training tools, you’ve probably come across prong collars. Sometimes called pinch collars, these metal collars with inward-facing prongs are often marketed as tools for “strong dogs,” “stubborn breeds,” or dogs that pull on leash.

Some trainers still recommend them. Some pup parents are told they’re the only solution for leash pulling. Others are reassured that prong collars “don’t hurt” when used correctly.

But there’s a growing body of research, professional guidance, and modern training philosophy that says otherwise.

Organizations like the American Veterinary Society of Animal Behavior, the American Veterinary Medical Association, and the Humane Society of the United States all support training approaches that avoid aversive tools like prong collars in favor of humane, positive reinforcement methods.

In this guide, we’ll break down:

• What prong collars are
• How prong collars work
• Why they’re used in training
• The risks and downsides of prong collars
• What science says about aversive training tools
• Better, humane alternatives for leash training

Let’s dive in.

What Is a Prong Collar?

A prong collar (also called a pinch collar) is a metal training collar made of interlocking links with blunt prongs that face inward toward a dog’s neck. When tension is applied to the leash, the collar tightens and the prongs press into the dog’s neck.

Prong collars are designed to tighten evenly around the neck, which proponents claim mimics how a mother dog might correct her puppies. However, this comparison is widely disputed by behavior professionals and researchers.

Prong collars typically feature:

• Metal links with inward-facing prongs
• A martingale-style tightening mechanism
• A chain or fabric section for leash attachment
• Adjustable links for sizing

Unlike flat collars or harnesses, prong collars are intentionally designed to create discomfort when pressure is applied.

This discomfort is the core mechanism behind how prong collars “work.”

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How Do Prong Collars Work?

Prong collars work through a principle called positive punishment, which is part of the four quadrants of operant conditioning. 

Positive punishment means adding something unpleasant to decrease a behavior.

Here’s how that looks in practice:

• Your dog pulls on the leash
• The collar tightens
• The prongs press into your dog’s neck
• The sensation is uncomfortable or painful
• Your dog pulls less to avoid the discomfort

In simple terms, the dog learns:

Pulling = discomfort
No pulling = relief

This is also often paired with negative reinforcement, where pressure is released when the dog stops pulling. The dog learns that staying close removes the unpleasant sensation.

While this method can sometimes suppress behavior quickly, it doesn’t teach the dog what to do instead. It simply discourages the behavior through discomfort.

That’s one of the biggest concerns with prong collars. 

Why Are Prong Collars Used?

Prong collars are commonly used for:

• Dogs that pull on leash
• Large or strong dogs
• Reactive dogs
• Dogs labeled “stubborn”
• Dogs that lunge or bark on walks

Some trainers recommend them because they can produce fast results. A dog that previously pulled hard may suddenly walk more slowly when wearing a prong collar.

But fast results don’t always mean good results.

Suppressing behavior is not the same as teaching new skills. And when discomfort or pain is involved, there can be unintended consequences.

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The Risks of Prong Collars

While prong collars are often marketed as safe when used properly, there are both physical and behavioral risks associated with them.

Physical Risks

Even when fitted correctly, prong collars apply pressure to sensitive areas of a dog’s neck.

Potential physical risks include:

• Neck injuries
• Tracheal damage
• Nerve damage
• Thyroid issues
• Skin irritation or punctures
• Increased intraocular pressure (which may worsen eye conditions)

Dogs have delicate structures in their neck, including:

• The trachea
• Cervical spine
• Blood vessels
• Nerves

Repeated pressure or sudden jerks can strain these structures, especially in dogs that lunge or pull.

This is particularly concerning for:

• Small dogs
• Puppies
• Senior dogs
• Dogs with medical conditions
• Brachycephalic breeds

Even large, strong dogs are not immune to injury.

Behavioral Risks

The behavioral risks of prong collars are often even more significant.

Because prong collars rely on discomfort, dogs may begin to associate that discomfort with whatever they see at the time.

For example:

• Dog sees another dog → feels pain → associates dogs with discomfort
• Dog sees a stranger → feels pain → associates people with discomfort
• Dog hears loud noise → feels pain → becomes more fearful

This can lead to:

• Increased fear
• Increased anxiety
• Increased aggression
• Suppressed warning signals

This is particularly risky for reactive dogs.

A prong collar may stop the visible reaction temporarily, but the underlying emotion (fear, frustration, anxiety) often remains, or worsens.

What Does Research Say About Prong Collars?

For many pup parents, the decision to use a prong collar doesn’t come from a place of wanting to cause discomfort. It often comes from frustration, concern, or simply following advice from someone they trust. If your dog is pulling, reacting, or struggling on walks, it’s completely understandable to want a solution that works.

But as dog training has evolved, so has the research. And today, the science is becoming increasingly clear: training methods that rely on discomfort or punishment, like prong collars, come with risks and they aren’t necessary to teach dogs effectively.

Scientific research consistently supports positive reinforcement training over aversive methods like prong collars. Studies have found that dogs trained using aversive tools are more likely to:

• Show increased stress behaviors
• Have higher cortisol (stress hormone) levels
• Display more fear and anxiety
• Show more aggressive responses
• Learn more slowly in some cases

Meanwhile, dogs trained using positive reinforcement tend to:

• Show more enthusiasm for learning
• Learn new behaviors faster
• Retain behaviors longer
• Build stronger bonds with their pup parents

This difference matters. Because training isn’t just about behavior, it’s about how dogs feel while they’re learning.

One of the biggest concerns with prong collars is that they rely on avoidance learning rather than skill-building.

Positive reinforcement teaches dogs what to do.
Prong collars teach dogs what not to do.

And when dogs don’t know what to do instead, confusion and stress can increase. Over time, this can affect confidence, trust, and even emotional well-being.

What the Research Shows

Here are seven studies and expert sources that highlight the differences between aversive training methods and positive reinforcement:

1. Herron et al. (2009)

This study examined confrontational training techniques and their outcomes. Researchers found that dogs exposed to aversive methods were more likely to respond with aggression, while reward-based training resulted in fewer aggressive behaviors. In fact, 25% or more of dogs responded aggressively to confrontational techniques in certain situations.

This highlights an important point: when dogs feel uncomfortable or threatened, they may respond defensively, even if that’s not their usual behavior.

2. Ziv (2017)

This review analyzed multiple studies on aversive training methods and found consistent patterns:

• Aversive training was linked to increased stress, fear, and anxiety
• Reward-based training improved both learning and welfare
• There was no evidence that aversive methods were more effective long-term

This research reinforces the idea that you don’t have to choose between effectiveness and kindness, you can have both.

3. Cooper et al. (2014)

This study compared dogs trained using aversive collars to those trained using reward-based methods. Researchers found that dogs trained with aversive tools:

• Showed more stress behaviors
• Did not learn more effectively
• Experienced greater welfare concerns

In contrast, reward-based training produced similar or better results without the added stress.

4. Rooney & Cowan (2011)

This research looked at long-term outcomes of different training styles. Dogs trained using positive reinforcement were more likely to:

• Show better obedience
• Display fewer behavior problems
• Have stronger relationships with their pup parents

This highlights something important: training is about more than just behavior, it’s about the relationship you build along the way.

5. Hiby, Rooney & Bradshaw (2004)

This widely cited study found that reward-based training methods were:

• More effective overall
• Linked to fewer behavior issues
• Associated with lower levels of fear and aggression

Punishment-based training, on the other hand, was linked to increased behavior problems.

6. American Veterinary Society of Animal Behavior

The AVSAB’s humane training position statement recommends reward-based training methods and cautions against the use of aversive tools. The organization notes that punishment-based methods can negatively affect a dog’s welfare and that there’s no evidence they’re necessary for effective training.

This guidance reflects the growing consensus among veterinary behavior professionals.

7. Zazie Todd (2020) — Companion Animal Psychology

In research highlighted by Dr. Todd, dogs trained using positive reinforcement:

• Responded faster to cues
• Required fewer repeated commands
• Learned more reliably
• Experienced fewer welfare risks

These findings reinforce what many modern trainers already see every day: dogs learn best when they feel safe, confident, and motivated.

The Myth: “Prong Collars Mimic Mother Dogs”

One of the most common arguments for prong collars is that they mimic how mother dogs correct their puppies. It’s an idea that can sound reassuring, after all, if it’s “natural,” it must be okay, right?

But when we look more closely at how dogs actually communicate, this comparison starts to fall apart.

Mother dogs don’t rely on prolonged pressure or physical discomfort to teach their puppies. Instead, they use subtle, brief communication. A look, a shift in body posture, or a quick interruption is often enough. These interactions are short, context-specific, and part of a broader system of communication that includes play, guidance, and nurturing.

Most importantly, mother dogs also spend a significant amount of time teaching their puppies what to do, not just correcting them. Puppies learn through social interaction, exploration, and positive experiences.

Prong collars, on the other hand, rely on mechanical pressure applied by a human. The sensation can be repeated, prolonged, and disconnected from the natural communication dogs use with each other. Instead of teaching communication, it simply interrupts behavior through discomfort.

Modern behavior experts widely agree that prong collars don’t replicate natural canine communication. Dogs don’t use tools like this with each other, and because of that, prong collars can sometimes create confusion instead of clarity.

The Myth: “Prong Collars Don’t Hurt”

Another common claim is that prong collars don’t hurt, that they only apply gentle pressure and are harmless when used correctly.

It’s understandable why this idea is appealing. Most pup parents don’t want to use anything that could cause discomfort. But the reality is that prong collars are designed to change behavior by creating an unpleasant sensation. If there were no discomfort, the collar wouldn’t be effective.

Even mild discomfort can become stressful when it’s repeated over time, especially in situations that are already challenging, like busy walks or encounters with other dogs. And while some dogs may yelp or react visibly, many don’t. Dogs often suppress their responses, especially if they’re experiencing repeated corrections.

This can make it difficult to tell how a dog is truly feeling. A dog may appear calm or compliant on the outside, while still feeling anxious or uncomfortable internally.

Training works best when dogs feel safe and confident. When discomfort becomes part of the learning process, it can sometimes affect not just behavior, but also how a dog feels about walks, training, and even the world around them.

The Myth: “They Work Faster”

It’s true that prong collars can sometimes reduce pulling or other behaviors quickly. For many pup parents, that immediate change can feel like a relief, especially if walks have been frustrating or difficult.

But speed isn’t always the same as long-term success.

When behavior changes quickly due to discomfort, the behavior may be suppressed rather than truly learned. The dog may stop pulling to avoid the sensation, but they may not understand what they should do instead. Over time, this can lead to confusion or even new behavior challenges.

Positive reinforcement training often takes a bit more patience in the beginning, but it focuses on building skills. Dogs learn how to walk politely, check in with their pup parent, and stay calm around distractions. These are behaviors that last because the dog understands them, not because they’re avoiding something unpleasant.

In the long run, training built on encouragement and clarity doesn’t just change behavior. It builds confidence, strengthens communication, and creates a more enjoyable experience for both dogs and their pup parents.

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What Should You Use Instead of a Prong Collar?

The truth is, the most important “tool” for better walks isn’t a specific piece of equipment, it’s understanding how positive reinforcement works.

When you reward the behaviors you want to see more of, your dog learns what works. Over time, this builds skills that make walks easier and more enjoyable for both of you.

Positive reinforcement can be used to teach:

• Loose leash walking
• Check-ins during walks
• Staying close to your side
• Calm behavior around distractions
• Reactivity and emotional regulation
• Engagement and focus outdoors

These skills don’t rely on discomfort. Instead, they help your dog understand what you’re asking, which leads to more reliable, long-term results.

That said, equipment can still play a helpful role in setting you up for success, especially while you’re building those skills.

Front-Clip Harnesses

Front-clip harnesses are one of the most helpful tools for dogs who pull. Rather than applying pressure to the neck, these harnesses gently redirect your dog’s movement when they pull, making it easier to guide them without causing discomfort.

Benefits of front-clip harnesses include:

• Reduces pulling without pain or discomfort
• No pressure on the neck or throat
• Safer for dogs prone to lunging or pulling
• Helps improve control while training
• Easy to pair with positive reinforcement

Front-clip harnesses don’t “fix” pulling on their own, but they can make training easier and safer while you teach your dog the skills they need.

Flat Collars + Training

Some dogs can also do well with a flat collar, especially once they’ve learned loose leash walking skills. However, it’s important to be mindful of potential risks.

If a dog pulls hard on a flat collar, it can put pressure on sensitive areas of the neck, including the trachea, spine, and surrounding muscles. Over time, this can lead to discomfort or even injury, particularly for:

• Strong pullers
• Reactive dogs
• Puppies
• Small dogs
• Dogs prone to lunging

For dogs that pull frequently or intensely, a harness is often a safer option while you’re working on training.

Lucky for you (and your pup) we teach you all of these skills and more in our Pupford Academy+ training library, start watching and training today!

What to Do If You're Currently Using a Prong Collar

If you're currently using a prong collar, you're not alone. Many pup parents start using one because they were told it was the best (or only) option for pulling, reactivity, or difficult walks. Often, the goal is simply to make walks safer and less stressful for everyone involved.

Learning more about training and deciding to move away from a prong collar is a positive step. And the good news is that transitioning doesn’t have to happen all at once.

In many cases, the smoothest approach is to gradually shift toward skill-building and positive reinforcement. This might look like switching to a front-clip harness for added safety and comfort, while beginning to reward behaviors like loose leash walking, check-ins, and staying close.

Keeping walks short and manageable at first can also help set both you and your dog up for success. Practicing in quieter, low-distraction environments gives your dog the opportunity to learn without feeling overwhelmed. As your dog builds confidence and understanding, you can slowly introduce more challenging situations.

Progress doesn’t have to be perfect. Like any new skill, learning takes time, patience, and consistency. But with a focus on communication and encouragement, most dogs can learn to walk politely without relying on aversive tools.

And along the way, many pup parents notice something else, too, walks become less about managing behavior and more about enjoying time together.

💖Related Reading: Whose Walk Is It Anyway? Why You Should Add Choice-Based Enrichment To – Pupford

Recap: Should You Use a Prong Collar?

Prong collars are designed to reduce behavior through discomfort. While they may produce quick results, they come with physical risks, behavioral downsides, and potential long-term consequences.

Modern training methods offer humane, effective alternatives that focus on teaching rather than suppressing behavior.

Positive reinforcement training helps dogs:

• Learn faster (without behavior suppression)
• Feel more confident
• Build stronger bonds
• Enjoy training

At the end of the day, the goal isn’t just a dog that stops pulling.

It’s a dog that understands what you’re asking, enjoys working with you, and feels safe and confident in the world.

And that’s something a prong collar simply can’t provide. 🐾💛