The normal weight of a cat depends on its age, breed and body size. Generally speaking, a cat's normal weight should remain stable during its adulthood, but kittens have different growth stages, and their weight will continue to change with age.
The following are some general weight ranges:
Kittens: usually weigh 80-110 grams at birth, and increase to about 200 grams by the second week. As they age, their weight will also increase accordingly. Generally speaking, the weight of a kitten should be gradually increased under the veterinary advice to ensure normal growth and development.
Adult cats: Generally speaking, adult cats should weigh between 4-5.5 kg, but there are also some breeds of adult cats that may be heavier or lighter.
Elderly cats: As they age, older cats may lose slightly due to a decrease in their metabolic rate. However, excessive weight loss in older cats may indicate health problems and should be consulted with a veterinary doctor.
In short, the weight range of a cat should be based on its age, breed and body size, and regular physical examinations and veterinary advice can help ensure that its weight is within the normal range.