Illness, vaccinations, unfamiliar surroundings and psychological issues are some causes for a cat to avoid eating, explains WebMD. One of the first outward signs of feline illness is a loss of appetite, so it is important to consult a veterinarian if a cat refuses to eat.
Some conditions, such as toothaches, are relatively benign yet can impact a cat's appetite, states WebMD. Many times, however, an ongoing loss of appetite is an indication of something more serious, such as cancer, kidney failure, intestinal complications or pancreatitis. In addition to a decreased appetite, cats with kidney failure often have offensive breath, frequent urination, excessive drinking, a dry coat and mouth ulcers, particularly on the tongue and gums.
An adverse reaction to recent vaccinations may result in a decrease of appetite, WebMD reports. The condition is usually temporary and mild.
A feline may refuse to eat when its routines have shifted too much for its comfort, notes WebMD. Moreover, motion sickness may from a car ride or airplane trip may causenausea and an avoidance of food.
If a veterinarian rules out other possible causes, depression or anxiety may be to blame for a reduced appetite, according to WebMD. Household changes, new people and other animals can lead sensitive felines to boycott food.