Cat Bad Breath: Causes and Fixes
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Cat breath should not knock you over. Here is what causes bad breath in cats and how to freshen it safely.
It usually starts in the mouth
The most common cause of feline bad breath is dental disease — plaque and tartar buildup that inflames the gums and feeds odor-causing bacteria. By age three, most cats already have some degree of dental disease, so bad breath is often the first sign owners notice.
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Daily dental care
Brushing with a cat-safe toothpaste is the gold standard, and dental treats help on the days brushing does not happen. A tartar-control option like [Greenies Feline Dental Treats](/products/greenies-feline-dental-cat-treats) helps scrub plaque and freshen breath between cleanings. Look for products carrying the veterinary dental seal for proven results.
When breath signals something bigger
Not all bad breath is dental. A sweet or fruity odor can suggest diabetes, while a strong ammonia or urine-like smell may point to kidney disease. Breath that suddenly changes or worsens deserves a vet visit rather than just a dental treat.
Professional cleanings matter
Home care slows tartar but cannot remove what has hardened below the gumline. Periodic professional cleanings under anesthesia let your vet clean thoroughly and check for painful, hidden problems like resorptive lesions that are common in cats.
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Frequently asked
- Why does my cat's breath smell so bad?
- The usual cause is dental disease — plaque, tartar, and gum inflammation. Persistent or unusual odors can also signal kidney disease or diabetes, so a vet check is wise.
- Can dental treats fix cat bad breath?
- Dental treats help reduce plaque and freshen breath as part of daily care, but they do not replace brushing or professional cleanings when tartar has built up.