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Why Does My Dog’s Breath Smell So Bad? Easy Ways to Support Better Dog Dental Health
"Why does my dog's breath smell so bad?" If you've asked that while your dog pants happily in your face, you're not alone.
Widget, my Mini American Shepherd, has always had bad breath. On a rough day it's fishy death level, the kind that clears a room.
Bad dog breath is one of the most common things pet parents notice. The good news? A few simple daily habits can make a real difference.
For us, that's a Chew. Sip. Bite. routine with Dental Fresh, and it fits into even our busiest weeks!
Disclosure: This post is sponsored by Dental Fresh. It also contains affiliate links, so I may earn a small commission at no extra cost to you. All opinions are my own (and Widget's opinions are very much his own too).
Common Causes of Bad Breath in Dogs
So, why does my dog's breath smell so bad? For starters, food and bacteria build up on teeth as plaque, and that's usually where the smell comes from.
Here are some of the most common causes:
Plaque and tartar buildup. Plaque that isn't cleaned away can harden into tartar along the gum line.
What they eat (and sneak). Smelly treats, garbage raids, and, yes, poop snacks all leave their mark.
Food stuck in teeth. Kibble bits, sticks and chew pieces can get wedged between teeth.
Grooming habits. Licking themselves can bring some funky smells straight to their mouth.
Other health issues. Sometimes bad breath is a sign of something your vet should look at.
That last one is why I never assume stinky breath is "just dog breath." More on that below.
Why Does My Dog's Breath Smell Like Fish?
Fishy breath is one of the most common complaints, and Widget is guilty as charged.
Often it comes back to bacteria and buildup in the mouth. Some pet parents describe it as dead fish, or even a metallic, iron-like smell. Yuck.
If the fishy smell is strong, sudden or sticks around, it's always worth a quick check with your vet.
Senior Dog Bad Breath: Why It Can Change With Age
Senior dog bad breath is really common. Years of everyday buildup add up, and older dogs may have more going on in their mouths.
If your older dog's breath suddenly gets worse, or they start chewing differently, book a vet visit. Changes in a senior dog are always worth a second look!
When to Check In With Your Vet
At-home care is great, but it doesn't replace your vet. The American Veterinary Medical Association recommends having your pet's teeth checked at least once a year.
Book a visit sooner if you notice any of these:
Bad breath that suddenly gets much worse or smells different
Broken or loose teeth
Discoloured teeth or visible tartar
Drooling, dropping food or chewing on one side
Eating less or refusing food
Bleeding, swelling or pain around the mouth
Irritability or pawing at their face
Professional dental cleanings are done under anesthesia so your vet can clean safely below the gumline. Colorado State University's veterinary hospital explains why that matters.
Think of daily habits as in-between care for dog bad breath. They support your dog between vet visits, not instead of them.
How Often Should I Brush My Dog's Teeth?
Daily brushing is the gold standard. The AVMA notes that brushing several times a week can still help when daily isn't realistic.
Now for my honest confession. I try to brush Widget's teeth at least weekly, but life gets the best of us.
During busy seasons, I can barely remember to brush my own teeth. If that sounds familiar, you're in good company.
If you do brush, always use a toothpaste made for dogs, never human toothpaste.
And for dogs who aren’t toothbrush fans? That’s where an easy daily routine comes in.
Who a Chew. Sip. Bite. Routine Is For
This routine is made for real life. It's a great fit if:
Your dog's breath makes you lean away during cuddles.
Your dog thinks a toothbrush is a torture device.
You want an easy habit that takes seconds a day.
You want to support your dog's oral care between vet visits.
It's not a replacement for brushing or vet care. It's an easy way to support both!
A Quick Look at Dental Fresh
Dental Fresh makes oral care products for dogs and cats. Each step in their Chew. Sip. Bite. routine does something different, so they work best together.
Step | Product | What it adds | Who it’s for |
Chew | Dental Treats | A grooved texture that helps clean teeth as your dog chews | Dogs |
Sip | Water Additive | Supports fresh breath and daily oral hygiene every time they drink | Dogs and cats |
Bite | Dental Bites | A soft daily supplement that supports breath, teeth and gums from the inside out | Dogs |
Chew: Dental Treats for Dogs
Dental Fresh Dental Treats have a grooved texture that helps clean teeth through your dog’s natural chewing action. That supports cleaner teeth and fresher breath, and Widget thinks he’s just getting a treat.
Give your dog one treat per day, based on their size. They come in four sizes:
X-Small: up to 10 lbs
Small: 11 to 25 lbs
Medium: 26 to 49 lbs
Large: 50+ lbs
Dental Fresh Dental Treats for Dogs
Daily dental chews that support cleaner teeth and fresher breath. Available in four sizes.
Sip: A Water Additive for Dogs' Breath
The Dental Fresh Water Additive supports fresh breath and daily oral hygiene through something pets already do: drink water. It’s flavourless and free from alcohol and artificial flavours.
It’s also the one step both dogs and cats can use. More on that below!
To use it, add one capful for every 8 oz of water. Use it daily in your dog's fresh water.
The Original and Advanced formulas are made for both dogs and cats. There's also a tuna-flavoured formula made just for cats.
Dental Fresh Water Additive for Dogs & Cats
An easy addition to your pet's daily oral care routine! Just add it to their water bowl to help freshen breath.
Bonus: Can Cats Use a Dental Water Additive Too?
Yes! The Original and Advanced formulas are made for both cats and dogs. That's a big win in our house, because all our pets share water bowls.
Sprout, our Siberian cat, drinks from the bowl like normal. And Sprout's breath is less fishy too, which I definitely noticed.
If your pets share bowls like ours, stick with the Original or Advanced formula. The tuna-flavoured formula is made just for cats.
Dental Fresh Dental Treats and Dental Bites are made for dogs, so the water additive is the cat-friendly step. If your cat has a health condition, check with your vet first.
Bite: Dental Fresh Dental Bites
Dental Bites are soft daily supplements made with postbiotics and kelp. They help support fresh breath, healthy teeth and gums from the inside out.
So what’s the difference from Dental Treats? Treats help clean teeth as your dog chews.
Bites support oral health from the inside. Each jar holds 120 bites, so follow the feeding amount for your dog’s weight on the label.
Dental Fresh Dental Bites for Dogs
Soft daily chews that support fresh breath, healthy teeth and gums. An easy addition to Widget's routine, and another treat he loves!
Our Honest Experience With Dental Fresh
Widget has tried every product in the Chew. Sip. Bite. routine. Here's how it went in our house.
What We Loved
The treats and bites were an instant hit. Widget loves them and had no issues at all. As far as he's concerned, it's snack time.
He doesn't even notice the water additive. He drinks from his bowl like normal.
It works with our real life. Adding a capful to his bowl takes seconds, even on chaotic days.
His breath is SO much better. When he's panting beside me, it no longer smells like fishy death. He's far less likely to clear a room.
Widget will always be a bit of a stinky-breath dog. But when I stay on top of his dental care, it helps SO much.
This combination makes staying on top of it easy.
What to Know Before You Buy
Honestly, I don't have any real cons. A few things are still worth knowing:
Consistency matters. It's a daily routine, so it works best once it becomes a habit.
It works alongside your vet. Keep up with annual checkups so your vet can spot anything at-home care can’t.
Pick the right treat size. Dental Treats are sized by weight, so check before you order.
Spray-shy dogs need time. We also tried the Dental Fresh Oral Spray. Widget thinks every spray bottle means grooming time, LOL. With patience and positive reinforcement, he no longer runs the other way.
Brushing, Treats or Water Additives: Which Is Right for Your Dog?
The best way to manage bad breath in dogs is the one you'll actually stick with. Here's how the main options compare.
Option | Effort | Best for |
Brushing | High | Dogs who tolerate a toothbrush |
Dental treats | Low | Dogs who live for their daily treat |
Water additive | Very low | Busy days and picky dogs |
Dental bites | Low | Easy daily support with no fuss |
Vet dental cleaning | Vet visit | A deep clean below the gumline |
The easiest routine is the one that fits your day. For us, that’s a chew, a capful and a bite.
Dog Bad Breath FAQ
What can I give my dog for bad breath?
Start with a vet check to rule out anything bigger. For everyday support, dental treats, dental bites and a
water additive are easy options. We use all three from Dental Fresh.
What can I put in my dog's water for bad breath?
A dog water additive made for oral care is the easiest option. You add it to the bowl, and your dog drinks as usual. With Dental Fresh, it's one capful per 8 oz of water.
My dog won't let me brush his teeth. What now?
You’re not alone! Some dogs just aren’t toothbrush fans, even with lots of praise. On those days, a chew, a capful and a bite still give you an easy daily routine.
Can I use dental treats and a water additive together?
Yes. Dental Fresh designed them to work together as one daily routine. If your dog has a health condition, check with your vet first.
Is bad breath in dogs normal?
A little doggy breath is normal. Breath that's very strong, suddenly worse or paired with other symptoms is worth a vet visit.
Start Your Dog's Chew. Sip. Bite. Routine
If you've been asking "why does my dog's breath smell so bad?", this is the easiest place to start. A chew, a capful and a bite a day is all it takes.
Shop Dental Fresh on Amazon, or learn more about the full lineup at dentalfresh.com.
Looking for more pet parent finds? Check out my favourite Canadian dog brands. You'll also love my Prime Day picks and the products I'd buy again.
And if you try it, tag us! (@hercozycrew on Instagram) Widget wants to know if your pup loves the treats as much as he does.
