- Viral diseases: Distemper, feline leukemia, feline infectious peritonitis (FIP), feline immunodeficiency virus (FIV), panleukopenia, herpesvirus.
- Bacterial diseases: Brucellosis, tuberculosis, tularemia, leptospirosis, salmonellosis, chlamydiosis.
- Parasitic diseases: Coccidiosis, giardiasis, toxoplasmosis, sarcoptic mange, demodicosis, flea infestations, tick infestations, intestinal worms.
- Protozoal diseases: Babesiosis, trypanosomiasis, leishmaniasis.
- Fungal diseases: Dermatophytosis (ringworm), cryptococcosis, histoplasmosis, blastomycosis.
- Metabolic diseases: Obesity, diabetes, renal failure, hepatic lipidosis.
- Nutritional disorders: Vitamin A deficiency, vitamin D deficiency, calcium deficiency, magnesium deficiency.
Invasive predators: Lions usually kill young and less experienced individuals to maintain their hunting territory, causing mortality on leopard cubs and subadults that have lost their mother