FORL in cats
med. vet. Angela Berchtold
29.06.2025
FORL in Cats: The painful dental disease that often goes unnoticed
Cats naturally show very few signs of pain – making FORL (Feline Odontoclastic Resorptive Lesions or simply RL = resorptive lesions) particularly insidious. This chronic and progressive dental disease affects many cats but often remains undetected for a long time.
What happens with FORL?
In FORL, the body’s own cells (odontoclasts) destroy the tooth – usually starting at the neck or root. This often occurs below the gum line – invisible to the eye but extremely painful for the cat.
Why is it often unnoticed?
Cats usually remain quiet when in pain. Changes – like reduced appetite, difficulty eating, withdrawal, or lack of interest in play – come gradually and are often mistaken for “normal aging.” Only after dental treatment is the difference often striking: the cat appears more lively, eats better, and plays again. That’s when many realize how much their cat had been suffering.
How is FORL diagnosed?
Often not at all – at least not without a specialized examination. Possible signs include:
- Preference for soft food or refusal to eat
- Drooling or bleeding from the mouth
- Discomfort when touching head/mouth
- Food falling from the mouth
BUT: No symptoms doesn’t mean no pain!
How is FORL diagnosed?
Only a dental examination under anesthesia with dental X-rays provides certainty. Modern anesthesia is very safe, even for older cats. The procedure usually lasts 30–90 minutes – and can give your cat a pain-free life.
Can FORL be prevented?
Not completely. But:
- Regular dental care
- Annual dental check-ups
- Early action in case of changes in feeding or behavior help detect dental disease early.
You suspect FORL in your cat or want to take precautions?
Our veterinarians will be happy to advise you individually. Our dental team works to the latest standards – gentle, low-pain, and with a focus on sustainable quality of life for your furry friend.