You might see a greyhound or lurcher wearing a muzzle on a walk and wonder why. The dog seems calm, friendly, well-behaved – so what is the muzzle for? The answer often comes down to prey drive, a natural instinct that has nothing to do with aggression.
At Forever Hounds Trust, every hound wears a muzzle initially until we can assess whether they can be safe without one. This isn't a punishment or a sign that the dog is dangerous; it's just the safest approach whilst we get to know each individual dog. Some hounds continue to wear muzzles throughout their lives, while others can learn to do without.
Prey drive in greyhounds
Prey drive is the instinct to chase and catch small, fast-moving animals. It's a natural trait in sighthounds, who were bred to 'hunt by sight and speed'. Not every sighthound has a strong prey drive, but in the racing industry, this instinct is deliberately developed and encouraged. Greyhounds learn to chase a fast-moving lure around the track with intense focus and determination.
However, prey drive is not aggression. A hound with high prey drive isn't being 'bad' or 'vicious'; they are simply responding to deep-rooted instincts that their racing training has reinforced. When they see something small moving fast (like a rabbit, a squirrel, or even a small dog darting across the park), their brain says 'chase'. But what happens if they were to catch it? They could give it a good shake, but not out of aggression - just instinct.
Many ex-racers have spent their entire lives around other greyhounds and chasing lures. They may never have met a Yorkshire Terrier, a cat, or a rabbit up close, so they don't recognise these animals as potential friends. Some hounds will stand and stare at smaller dogs, clearly wanting to interact but conflicted between curiosity and chase. A predatory response could easily be triggered by movement or speed, and that's why it is safer for everyone if they wear a muzzle.
What and who do muzzles protect
Muzzles serve multiple purposes, and they protect everyone involved.
Other animals: A muzzle prevents a hound from harming smaller dogs, cats, or wildlife if their prey drive is triggered. This protects someone else's beloved pet from a potentially serious or fatal injury, and it protects local wildlife from an instinctive reaction the dog cannot always control.
Your hound: Muzzles protect dogs from the consequences of their instincts. If a hound were to injure or kill another animal, there could be legal repercussions, and the situation could result in the dog being removed from your care. A muzzle prevents this from happening. It also means your hound can enjoy public spaces and walks where they might encounter small animals, rather than having to avoid these areas altogether.
You, the owner: A muzzle gives you confidence in public spaces. You can walk your hound in busy parks or crowded pavements without constant worry. Our resource about recall training provides guidance on keeping your hound safe off-lead in different environments.
A muzzle is not about restricting your hound – it is about giving them freedom to enjoy walks and public spaces safely. Our resource about recall training provides guidance on keeping your hound safe in different environments.
Not every hound needs a muzzle: how we assess each dog
Whilst every hound starts out wearing a muzzle when they come into the care of Forever Hounds Trust, not all of them need to wear one long-term. Each dog is different, and we assess them individually based on their behaviour and responses to the world around them.
Our behaviourists carefully observe how each hound reacts to different situations: meeting other dogs, seeing small animals, or seeing sudden movements. Some dogs do not have a strong prey drive; others may have it, but learn over time to recognise smaller dogs as friends rather than prey. These hounds may eventually prove they can be safe without a muzzle.
However, if a hound's prey drive remains strong (particularly if it was heavily reinforced during their racing career), they may need to wear a muzzle throughout their life. That muzzle allows them to live a full, active, happy life without risk.
Once homed, your hound will continue to learn about the world around them. You will get to know your own dog, understand their triggers and responses, and make the right decision for them. If you have adopted a Forever Hounds Trust dog and have questions about muzzling, our behaviour team is always available for free advice.
Other reasons dogs might wear muzzles
Whilst prey drive is the most common reason hounds wear muzzles, there are other situations where muzzles are helpful - and these apply to any breed, not just sighthounds.
Scavenging: Some hounds try to pick up and eat things on walks: discarded food, rubbish, or even dangerous items like chicken bones or toxic substances. A muzzle prevents this whilst you work on training.
Veterinary visits: Even the calmest, friendliest dog can become frightened or defensive when they are in pain or being examined, and may even try to bite the vet. Muzzles ensure that in an emergency, your dog can be safely handled without added stress.
Fear or anxiety: Some dogs can react defensively when meeting unfamiliar people or dogs. A muzzle gives everyone breathing room whilst you work on building confidence.
Setting the record straight: common misconceptions about muzzled hounds
"A muzzled dog must be dangerous"
Not at all. Most muzzled hounds are perfectly friendly, gentle dogs with strong prey drive. They are not aggressive towards people or other dogs; they have an instinct that needs managing in certain situations. Take a typical ex-racer: they might be affectionate, love meeting new people, enjoy the company of other greyhounds, and be completely soft and docile at home. The muzzle is purely about preventing their chase instinct from causing harm if a small animal triggers their predatory instinct.
"It's cruel to muzzle a dog"
A properly fitted basket muzzle is not cruel. These muzzles are lightweight and allow a hound to pant, drink water, and even take treats through the gaps. Ex-racing greyhounds are already accustomed to wearing muzzles from their track days, and most have positive associations with them – a muzzle often means it is time for a walk. The muzzle does not hinder them or cause discomfort. If you are introducing a muzzle to a hound who has not worn one before, positive training ensures they are completely comfortable. See our resource on muzzle training for guidance.
"My hound would hate wearing one"
Most hounds adjust to muzzles quickly and easily, particularly if they have worn them before. With positive reinforcement training, even dogs new to muzzles learn to accept them happily. The key is ensuring a proper fit – a well-fitted muzzle sits comfortably and does not restrict natural behaviours. For guidance on choosing the right size and style, see our Muzzle Fitting Guide.
We hope this dispels some of the myths around our hounds wearing muzzles. Hopefully, it also shows why it can be hard to find a sighthound that is cat-friendly! Prey drive does not mean these dogs are aggressive - in fact, as many of you know, greyhounds are amongst the gentlest breeds around. When properly introduced to muzzles, they are not at all stressed about wearing them - they allow them to enjoy life with less risk.