Disease Library
A comprehensive reference covering feline diseases across every major body system — causes, symptoms, diagnosis, treatment, and prevention.
Feline Nodular Dermatofibrosis
A condition causing multiple firm skin nodules, genuinely notable for its recognized, though not fully understood, association with…
skinFeline Nodular Panniculitis
Inflammation of the fat layer beneath the skin, causing firm, sometimes painful nodules — genuinely uncommon in cats, and can result from…
liverFeline Non-Cirrhotic Hepatic Fibrosis
A condition involving abnormal scar tissue formation within the liver without the more advanced architectural distortion characteristic of…
poisoning toxicologyFeline NSAID Toxicosis
Poisoning from non-steroidal anti-inflammatory drugs (like ibuprofen or naproxen, common human over-the-counter pain relievers), to which…
endocrineFeline Nutritional Secondary Hyperparathyroidism
A condition resulting from a severely calcium-deficient or phosphorus-excessive diet, causing the body to compensate by increasing…
endocrineFeline Obesity
Excess body fat accumulation significant enough to negatively affect health, genuinely one of the most common nutritional conditions seen…
parasiticFeline Ocular Toxoplasmosis
Eye involvement specifically from Toxoplasma gondii infection, a notable presentation within the broader Toxoplasmosis disease picture —…
cancerFeline Oral Fibrosarcoma
A malignant tumor arising from fibrous connective tissue specifically within the mouth, distinct from the more commonly discussed squamous…
dentalFeline Oral Melanoma
A malignant tumor arising from melanocytes (pigment-producing cells) within the mouth, genuinely uncommon in cats compared to some other…
dentalFeline Oral Tumors
Growths within the mouth, which in cats are unfortunately malignant (cancerous) in a substantial proportion of cases — squamous cell…
eyeFeline Orbital Cellulitis
A significant infection affecting the tissue surrounding the eye within the bony eye socket (orbit), genuinely more serious than…
reproductiveFeline Orchitis
Inflammation of the testicle(s), which can result from infection, trauma, or in some cases, an immune-mediated process — causes visible…
reproductiveFeline Orchitis and Epididymitis
Inflammation of the testicle (orchitis) and/or the epididymis (epididymitis, the structure where sperm mature and are stored), most…
dentalFeline Orofacial Pain Syndrome (FOPS)
A condition causing episodes of apparent significant oral/facial pain and pain-related behavior (exaggerated licking, chewing motions,…
dentalFeline Oronasal Fistula
An abnormal opening connecting the mouth and nasal cavity, most commonly developing as a complication of severe periodontal disease…
parasiticFeline Oslerus rostratus Infection
A genuinely rare parasitic infection affecting the respiratory system, distinct from the more commonly discussed lungworm species —…
musculoskeletalFeline Osteochondroma
A benign bone tumor arising from cartilage, genuinely notable in cats because, unlike the typically benign, non-progressive behavior of…
musculoskeletalFeline Osteochondrosis
A developmental condition affecting normal cartilage-to-bone conversion within growing joints, genuinely much more extensively documented…
cancerFeline Osteosarcoma
A malignant bone tumor, less common in cats than in dogs but still occurring and requiring prompt evaluation of any unexplained limb…
earFeline Otitis Externa
Otitis externa is inflammation of the outer ear canal. It's less common in cats than dogs but still occurs, most often secondary to ear…
earFeline Otitis Media and Interna
Otitis media and interna refer to infection or inflammation of the middle and inner ear, respectively — deeper structures than the outer…
parasiticFeline Otodectes cynotis infestation
Ear mites are a tiny parasite living on the surface of the ear canal, and are the most common cause of otitis externa in kittens and cats…
reproductiveFeline Ovarian Remnant Syndrome
A condition where a spayed female cat continues to show signs of heat (estrus) behavior because a small piece of ovarian tissue was…
digestiveFeline Pancreatic Pseudocyst
A fluid-filled structure developing near the pancreas, typically as a complication of pancreatitis, distinct from a true cyst given its…