Signs Your Cat May Be Dying. When your cat’s body temperature drops, this is one of the symptoms that he or she is dying. Cats may be lethargic and unwilling to be active.

The cat may have difficulty standing, walking, accessing the litter tray or climbing stairs and may appear weak. A lowered heart rate is a sign that the cat may be getting weaker and nearing death. Lethargy is a common sign of illness in cats.