Cats are masters at hiding illness, a tendency sometimes called the "behavioral iceberg"—subtle changes often signal serious underlying problems. Red flag symptoms warranting immediate veterinary attention include not eating for more than twenty-four hours, straining to urinate, repeated vomiting, lethargy, and changes in breathing. A male cat with a urinary blockage is a life-threatening emergency requiring immediate care; signs include crying in the litter box, frequent attempts to urinate with little or no output, and lethargy. Feline Lower Urinary Tract Disease (FLUTD) is a common umbrella for urinary issues in cats. Pain in cats often looks like hiding, decreased grooming, reduced appetite, a hunched posture, changes in litter habits, or unusual vocalization.
Several chronic conditions become more common with age. Chronic kidney disease (CKD) is one of the most frequent diagnoses in senior cats and is manageable through diet and medication. Hyperthyroidism causes weight loss despite an increased appetite and is also common in older cats. Feline diabetes is a metabolic disease managed through diet and sometimes insulin. Heart disease, particularly hypertrophic cardiomyopathy (HCM), is often hidden and shows no early symptoms; some breeds like Maine Coons and Ragdolls are genetically predisposed. FIP, once a death sentence, is now treatable with antivirals such as GS-441524, dramatically changing outcomes.
Preventive care dramatically extends feline lives. Dental disease is extremely common—periodontal disease affects most cats by age three—and supporting dental health through dental treats, dental food, occasional brushing, and professional cleanings can add one to three years to a cat's life on average. Weight management is critical because obesity raises the risk of diabetes, arthritis, and urinary disease. The Body Condition Score (BCS) is a one-to-nine scale, with an ideal of four to five, where ribs are felt easily and the waist is visible. Senior wellness exams twice a year for cats aged ten and older catch problems early. Many clinics now practice fear-free veterinary care, using low-stress handling and pheromones to make visits less traumatic. Setting up the carrier as a permanent safe space at home, rather than reserving it for vet trips, helps reduce stress, and gentle restraint—comforting holds with minimal force—replaces outdated scruffing techniques. Pet insurance helps cover unexpected costs (emergency vet visits often run $500–$3,000+), though pre-existing conditions are typically excluded.