When a cat is nearing the end of its life, it will exhibit some obvious symptoms.
Cats may start refusing food, or even lose interest in foods they used to like, which leads to a gradual loss of weight and emaciation.

Reduced activity level: Cats become less active, less playful, and prefer to lie down and rest or sleep for long periods of time.
Sensory degeneration: Their sensory abilities, such as vision and hearing, will be significantly reduced, their sensitivity to the environment will decrease, and their reactions will become sluggish.