Last Updated: 11/02/2026
Is a Dry Nose a Sign of Illness in Dog & Cats?
Does a warm, dry nose mean your dog or cat has a fever? Discover the truth behind this common pet myth, why noses stay wet, and the real signs of nasal illness to watch for, from discharge to pigment changes.
Author: Dr Carla Paszkowski BVSc (Hons)
Reading Time: 7 minutes - short read
It is one of the most common concerns voiced in the consult room: "Doctor, I think my dog is sick - his nose is dry." For generations, the "cold, wet nose" has been held up as the gold standard of pet health. It is a comforting thought, but the idea that a dry nose automatically equals a fever or illness is one of the most enduring myths in the pet world.
In reality, a pet’s nose can switch from damp and chilly to warm and dry several times a day depending on their nap schedule, the weather, or even the humidity in your living room. Understanding what is actually "normal" can save you a lot of unnecessary worry.
Why do dogs and cats have wet noses?
It's important to understand the true function of your pet's nose. Dogs and cats have wet noses for a number of reasons, which relate to a range of different functions:
1. To trap scent particles
Within their noses lie some mucous glands. Just like us, dogs and cats salivate when they smell something delicious and this causes some secretion from the glands inside their nose.
This secretion helps them absorb the scent, as the mucous captures and dissolves molecules in the air and brings them into contact with specialised cells and the highly developed canine vomeronasal organ.
Pets then lick their noses to taste the fluid that's been secreted, which dampens the surface of the nose.
2. To regulate body temperature
The temperature and dryness of a cat or dog's nose will be dependant on the environment.
Dogs who have been outside in the heat or wind are more likely to have a dry nose. Nose pads, along with the footpads, are the only places that dogs sweat from, so your dog is more likely to have a wet nose when they're hot.
So in general, your pet is most likely to have a wet nose before or during meal times, when they're out absorbing scents, and to help cool them down.
Is a dry nose a sign of a sick pet?
Generally, no. While a dry nose can indicate lack of hydration in some cases, by itself it does not indicate illness.
The "dog nose" myth has been around for centuries. So how did it start? Like many myths, the true source of this myth isn't known for sure. A number of origin theories exist - one of the most entertaining has to be a biblical tale that describes two hounds on Noah's Ark. In the story, one of the hounds found a snout-sized hole in the Ark that threatened to sink the entire animal kingdom. So while one hound plugged the hole with its nose, the other went off barking to get help - and God rewarded all dogs by giving them wet noses.
However, some experts think that the myth is more likely to have started at a time when canine distemper (a deadly virus that dogs are vaccinated against nowadays) was commonplace. One symptom of severe distemper is hyperkeratosis (thickening) of the skin on the footpads and nose. When canine distemper was widespread, it was therefore a good sign if your pet had a cool, wet nose because it meant that your dog didn't have distemper.
Nasal symptoms to worry about
Rather than worrying about how wet or dry your pet's nose is, there are a number of other nasal signs that may indicate your pet is unwell.
The main signs to look out for with your cat or dog's nose include:
- A change in colour, such as a loss of pigment
- A change in texture, particularly if the skin is thickened
- Nasal discharge - particularly green, red, yellow, or white
- Signs of trauma such as cuts or bleeding
- Any other signs and other signs of illness such as inappetence, lethargy, vomiting and diarrhoea.
If your dog is showing any of these signs it's always a good idea to have them checked out by your vet. If they are otherwise well, but their nose feels dry or warm, this is most likely normal for your dog.
If your pet is showing any of these signs it's always a good idea to have them checked out by your vet. If they are otherwise well, but their nose feels dry or warm, this is most likely normal for them.
Why is my dog's nose changing colour?
Loss of pigment on the skin of the nose can be a sign of certain diseases, such as autoimmune conditions. However, the colour of a dog's nose may vary depending on the breed - and practically the whole rainbow is represented on the spectrum of 'normal'. A dog's nose may be black, brown, liver, pink, or very pale.
Is it normal if a dog's nose changes colour?
Sometimes a dog's nose can lighten or darken as they age. Puppies are often born with pink noses, which later darken. But what if the nose loses its pigment, turning lighter or white? De-pigmentation of the nose is sometimes harmless, but sometimes it may be cause for concern.
Possible causes of depigmentation on your pet's nose include:
- Old age: Depigmentation can be a normal part of the ageing process.
- Injury: Trauma such as a scrape or abrasion can cause scarring and the nose may appear light in colour.
- Bacterial infection: Infections cause a host of symptoms, including inflammation, pain, discharge, and sneezing, but depigmentation can also occur as part of the presentation.
- Idiopathic depigmentation: Also known as "Dudley Nose" is when a dog's nose turns pink or even white for an unknown reason. In some dogs it may regain pigment, and can even change seasonally. Breeds most prone to "Dudley Nose" include the Doberman Pinscher, Golden Retriever, Irish Setter, Pointer, Poodle, Samoyed and the White German Shepherd.
- Contact allergies (contact dermatitis): If your dog is allergic to something that the nose touches, it may cause a local reaction involving depigmentation and inflammation. The lips are usually also affected too. This is a common occurrence when dogs are allergic to plastic food bowls, and a swap to a porcelain or steel bowl can help.
- Pemphigus: An immune-mediated skin disorder. This condition can cause sores, inflammation and pain and around your dog's nose, but is completely treatable with medication from your vet.
- Discoid Lupus: Another immune-mediated disorder that can also cause sores on and around the dog's nose. This condition can worsen with sun exposure.
- Vitiligo: Another immune-mediated disorder in which healthy, pigment-carrying cells are blocked by attacking antibodies. This condition can affect pigment all over the body - turning the coat white in scattered patches. The disorder can get worse over time turning a once dark dog white, but generally doesn't affect the overall health of your dog. Breeds most prone to Vitiligo are the Dachshund, Doberman Pinscher, German Shepherd, Labrador Retriever and the Rottweiler.
- Skin cancer: Generally uncommon in cats and dogs, but can occur in light-skinned animals with pink noses. Dogs with pale noses are prone to sunburn and precautions should be taken. For dogs, a doggy sunscreen can come in handy during periods of sun exposure, while for cats, limiting their exposure to the sun is ideal.
FAQs
While a wet nose is a fantastic tool for sniffing out treats and staying cool, a dry nose is rarely a cause for panic on its own. By focusing on your pet’s overall energy levels, appetite, and any unusual discharge, you can get a much clearer picture of their wellbeing. If you are ever in doubt, a quick check-up with your vet is the best way to keep that tail wagging and that snout healthy.
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History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Wed 11 Feb 2026
Edited by Dr Gillian Hill BVSc (Hons)Dr Carla Paszkowski BVSc (Hons)
Veterinarian
Dr. Carla graduated from the University of Queensland in 2013 with a Bachelor of Veterinary Science and worked for a number of years in small animal clinics across South East Queensland. While Carla enjoys most facets of clinical veterinary work, she holds a special passion for feline medicine, pocket pets, and nutrition.
