It's a question people are often embarrassed to ask, and ask anyway — usually late at night, usually before bringing the container indoors. There's nothing strange about it. You're about to give something a permanent place in your home, and you want to know what you're bringing in.
Here's the honest answer, what a faint smell usually turns out to be, and the question that comes right behind it: whether your other dog or cat can smell them.
Why cremated ashes don't smell
Cremation reaches temperatures high enough that organic material is completely consumed. What's returned to you isn't ash in the fireplace sense — it's bone mineral, processed into a fine, granular texture. It's chemically inert, sterile, and there is nothing left in it that can break down.
Odour comes from decomposition or from volatile compounds. Neither applies here. That's also why ashes keep indefinitely: they don't decay or expire, and there's no point at which they start to smell. If you'd like to know what you'll actually be looking at when you open the container, what pet ashes look like sets expectations before the moment arrives.
So why can I smell something?
Because something else in the package usually can. Almost every report of a smell traces back to one of these.
| Likely source | What it smells like | What to do |
|---|---|---|
| The temporary container | Cardboard, musty, faintly plasticky | Move the sealed bag into a proper urn and discard the box or tin |
| The bag's seal or ID label | Adhesive, tape, a chemical edge | Wipe the outside of the bag with a dry cloth; the smell is on the outside, not the contents |
| A brand-new urn | Wood finish, glue, a "new object" smell | Leave the empty urn open in a ventilated room for a day or two before filling it |
| Damp storage | Musty, like a cupboard or basement | Move to a dry indoor shelf; check the bag is intact |
| Ambient odour picked up in storage | Whatever was stored nearby | Air the container; store away from cleaning products, paint, or a garage |
The single most common one, by a distance, is the first. Crematories return ashes in a plain cardboard box or a tin that was never meant to be permanent, and cardboard held in a warm car or a cupboard picks up a smell readily. Nothing has gone wrong — the packaging has simply done its job and is ready to be replaced.
What to do about it
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1Move them out of the temporary container. Keep the sealed bag exactly as it is and place it into an urn. You don't have to open the bag or handle anything. Our step-by-step transfer guide covers it calmly.
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2Air a new urn before you fill it. Wooden urns and anything with a finish or an adhesive-set photo frame can carry a faint new-object smell for the first day or two. Leave it open in a ventilated room; it fades on its own.
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3Keep it dry. Moisture is the one thing that genuinely affects ashes — not by creating a smell in them, but by causing clumping and by making anything nearby musty. A dry indoor shelf solves it. Where to put a pet urn at home covers placement in full.
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4Don't try to mask it. Perfumed sprays, scented liners and essential oils inside an urn are worth avoiding — they add a smell rather than remove one, and an oil that reaches the ashes can't be undone. Find the source instead.
Can my other dog or cat smell the ashes?
This is the question that follows almost immediately for anyone with a surviving pet at home, and it deserves a straight answer: nobody really knows, and be wary of anyone who says they do.
What can be said with confidence is narrower. A dog's sense of smell is enormously more sensitive than ours, so "there's no odour" from a human standpoint doesn't settle what a dog detects. It's entirely plausible that a dog or cat notices something about a new object in the room — the box, the bag, your own scent on it, the change itself.
What can't be established is the part people actually want answered: whether a surviving pet recognises their companion. There's no good research on it. What exists is anecdote, and the anecdotes go every way — some owners describe a dog sniffing at the urn and then settling beside it, others a cat that shows no interest at all, others a pet that seems briefly unsettled and then indifferent. None of that tells you what's going on inside their head, and a confident story either way is someone's interpretation, not a finding.
What's worth holding onto: a surviving pet is very likely grieving the absence itself — the missing routine, the empty bed, the change in your own mood — far more than reacting to a container on a shelf.
If your other pet keeps going to the urn
It's usually harmless, and often quite moving. If it unsettles you, or if you're worried about the urn being knocked, the practical fix is placement rather than removal: a higher shelf, a wall behind it, or a glass-fronted cabinet. Cats in particular treat any raised surface as a route. There's more on this in where to put a pet urn at home.
Do urns themselves hold a smell?
It depends on the material, and the differences are small.
| Material | Smell, when new | Over time |
|---|---|---|
| Glazed ceramic | None | Non-porous, so it neither absorbs nor releases odour. See is ceramic safe for pet ashes |
| Brass and stainless steel | None | Non-porous; nothing to hold a smell |
| Wood | A faint finish or glue smell is common | Fades within days; airing it speeds this up |
| Cement and stone | Faintly mineral when new | Settles quickly indoors |
Ordinary
- No smell at all from the ashes
- Cardboard or musty smell from the temporary box
- Faint adhesive smell near the bag's label
- New-wood or finish smell from a new urn
- A surviving pet sniffing at the urn
Worth a call to the crematory
- A strong or foul odour
- A smell that persists after moving to a new urn
- Ashes that are visibly damp or clumped on arrival
- A bag that arrives damaged or open
- Anything that leaves you uneasy — just ask
Urns that don't hold a smell
If you'd rather not think about it again, a non-porous urn settles the question. Glazed ceramic and brass both seal the ashes away from the room entirely, and the sealed bag goes inside as it is.
Browse everything in the pet cremation urn collection.
Frequently asked questions
Do pet ashes smell?
No. Properly cremated ashes have no odour. Cremation happens at very high temperatures, so nothing organic remains to decay. What's returned is inert bone mineral, and it doesn't develop a smell over time.
Why do my pet's ashes smell musty?
Almost always the packaging rather than the ashes. The temporary cardboard box or tin picks up a musty smell easily, especially if it's been stored somewhere warm or damp. Moving the sealed bag into a proper urn and discarding the box usually resolves it completely.
Is it safe to keep pet ashes in the house?
Yes. Cremated remains are sterile and inert — no health risk, no odour, nothing that attracts insects. Keeping them at home is legal and one of the most common choices, for dogs and for cats alike.
Can my other dog or cat smell my pet's ashes?
Nobody can say for certain. A dog's sense of smell is far more sensitive than ours, so "odourless to us" doesn't settle it — but whether a surviving pet recognises their companion isn't something anyone has established. Reports vary from sniffing and settling nearby to no interest at all.
Does a wooden urn smell?
A new one can carry a faint finish or adhesive smell for the first day or two. Leaving it open in a ventilated room before you fill it clears this. Glazed ceramic and brass have no smell at all, new or otherwise.
Will the smell go away on its own?
If it's from the temporary container, it goes when the container does. If it's a new urn, it fades within a few days. Avoid perfumed sprays or scented liners — they add an odour rather than remove one, and anything oil-based can't be undone once it reaches the ashes.
When should I contact the crematory about a smell?
If the odour is strong or genuinely unpleasant, if it persists after you've moved the ashes into a new urn, or if the ashes arrive visibly damp or the bag is damaged. Describe what you're noticing and ask — it's a reasonable question and a reputable crematory will want to hear it.
Related guides
What ashes look like
Colour, texture and weight — what to expect before you open the container.
See what to expect →Storing them safely
Why moisture is the only thing that matters, and how to avoid it.
Read the storage guide →What happens during cremation
The process, step by step, in plain and gentle terms.
Read the guide →An urn that settles the question
Glazed ceramic and brass pet urns, made to order and personalised with your pet's name, portrait or photo — sized to hold the sealed bag with room to spare.
Browse pet cremation urns
