My puppy smells bad — what's causing it?
A bad smell on an otherwise well puppy is most often down to diet, normal skin oils, or simply needing a bath, and it settles with a wash and a look at what they are eating. It is worth taking more seriously when the smell is strong, localised to one area such as the ears or mouth, or comes alongside itching, redness or a change in behaviour, because those point to something that needs a vet's attention rather than a bath.
Usually not urgent
This is common and often manageable at home — but see a vet if it persists, gets worse, or comes with other changes.
The everyday causes
Puppies produce natural skin oils that build up between baths, and a young coat still settling into its adult texture can hold odour more than a fully grown dog's does. Diet plays a part too — some foods and treats leave a stronger smell on a puppy's breath and coat than others, without anything being wrong.
Rolling in something outdoors, getting wet and not drying off properly, or simply being due a bath are the most common everyday explanations, and none of them need anything more than a wash and a bit of time to resolve.
Anal gland scent is another everyday cause worth knowing about, particularly in a young dog whose glands have not settled into a normal emptying pattern yet. This produces a distinctive, quite strong fishy smell that is different from general body odour, and it usually resolves on its own as a puppy matures, though a vet or groomer can help if it becomes a recurring issue.
When the smell is coming from one place
A smell that seems to come specifically from the ears, mouth or a fold of skin is more informative than an all-over puppy smell. Ear infections often have a distinct, sometimes yeasty odour and usually come with head shaking or scratching at the ear. Dental issues, even in a young puppy with baby teeth, can cause noticeably bad breath.
Skin fold areas, in breeds that have them, and any patch of skin that looks red, greasy or is being scratched at, are worth a closer look — a localised smell almost always has a localised cause behind it rather than being a general hygiene issue.
Paw odour is a specific one worth mentioning, since a distinctive smell between the toes, sometimes described as smelling like corn chips, is common and usually harmless, coming from normal bacteria and yeast on the skin. It only needs attention if the paws look red, swollen or the puppy is licking at them persistently.
A basic grooming routine helps more than people expect
A regular, gentle brushing routine does two things at once: it distributes natural skin oils through the coat rather than letting them build up in patches, and it gives you a chance to notice anything unusual — a sore patch, a lump, unusually greasy fur — early, before it becomes the kind of problem that produces a strong smell on its own.
Drying a puppy thoroughly after they get wet, whether from a bath or the weather, matters more than it might seem. Damp fur held against warm skin is exactly the environment that lets odour-causing bacteria and yeast build up, particularly around the neck, armpits and any skin folds a breed happens to have, so a proper towel dry after every wet walk is worth the extra few minutes it takes.
When it is worth seeing a vet
Ring your vet if the smell is strong and persistent despite a bath, if it is clearly coming from the ears or mouth, or if it comes with scratching, redness, discharge, a change in appetite or your puppy seeming generally under the weather. These combinations point to something that needs treating rather than washing away.
A single bad-smelling day after a muddy walk is not a reason to worry. A smell that keeps coming back within days of a bath, or that is getting worse rather than better, is the pattern that is actually worth acting on, and it is always easier for a vet to identify the cause early than after it has been left to develop for weeks.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.

NanoSanitas Advanced No-Brush Dental Gel for Dogs & Cats
A brush-free dental gel for dogs and cats, formulated with silver nanoparticles and papaya extract to help reduce plaque and freshen breath.
£14.99

Pet Dental Cleaning Wipes (50 Pack)
A tub of 50 textured finger wipes that lift plaque and freshen breath for dogs and cats without a toothbrush. Slip one over your finger and wipe teeth clean for easy daily dental care.
£9.99

Pet Dental Care Gel
A gentle pump-dispensed dental gel for dogs and cats that helps reduce plaque and tartar build-up while freshening breath. Easy to apply for everyday oral care without scrubbing. 100ml.
£8.99
Common questions
- How often should I bathe my puppy to stop them smelling?
- Roughly every four to six weeks is right for most puppies, with more frequent washing only if they have got genuinely dirty. Bathing too often can strip natural oils from a young coat and skin, which can make odour and irritation more likely rather than less.
- Why do my puppy's ears smell?
- A yeasty or unpleasant smell from the ears is a common sign of an ear infection, particularly in breeds with floppy ears that trap moisture. This is worth a vet visit rather than home treatment, since the underlying cause needs identifying before it can be properly addressed.
- Can puppy food cause bad breath or body odour?
- Yes, some foods and treats leave a stronger smell than others on a puppy's breath and, less commonly, their coat, without there being anything wrong. If a change in food coincides with a change in smell, it is worth noting, though persistent bad breath is also worth mentioning to your vet in case a dental cause is involved.
- Is it normal for puppies to smell more than adult dogs?
- Slightly, yes — a young coat still settling into its adult texture and natural skin oils that have not yet found their balance can make puppies smell a little more than a fully grown dog between baths. This usually evens out as they mature, provided there is nothing else going on.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.