Causes specific to cats
In cats, the smell may be linked to chronic stomatitis, tooth resorption (FORL), periodontal disease, or root disease.
Stomatitis is often accompanied by red, painful gums and refusal of food — but sometimes there's only a persistent smell.
- Chronic stomatitis
- Tooth resorption (FORL)
- Periodontal inflammation
How this differs from dogs
Dogs more often have problems from tartar and periodontal disease. Cats — from resorption and mucosal inflammation, which need a different diagnostic approach.
A cat may eat normally but avoid having its face touched — a typical sign of oral pain.
How the cause is established
A full examination under anaesthesia with X-rays allows every tooth to be assessed and reveals resorption and inflammation that aren't visible while conscious.
When to see a vet
- Persistent bad breath, especially if the cat avoids having its face touched
- Drooling, red gums, or visible tooth damage
- The cat eats only soft food or refuses food
- The smell doesn't ease with better home care
What not to do at home
- Don't compare with dogs' experience — cats have different typical conditions
- Don't give human breath-freshening products
- Don't delay an examination hoping for "self-recovery"
- Don't brush aggressively if the cat reacts painfully — this can add to the stress
Frequently asked questions
A noticeable, persistent smell — no. A mild smell after eating can be temporary, but constant bad breath needs an examination.
Sometimes early on there's only a smell and mild bleeding. The full picture is only seen on examination under anaesthesia.