* Breed: Cat breeds vary significantly in size. A Maine Coon, for example, will be much larger than a Siamese.
* Individual Variation: Even within the same breed, cats have different body types and build. Some are naturally leaner, while others are more stocky.
* Health: A cat's health can affect its weight. For instance, a cat with a thyroid condition might gain weight, while a cat with parasites could lose weight.
* Diet and Exercise: A cat's diet and exercise habits can also impact its weight. A cat that is overfed and doesn't get much exercise is likely to be heavier than a cat that eats a healthy diet and gets plenty of exercise.
A healthy weight range for a 12-year-old cat is typically 8-12 pounds. However, it's best to consult with your veterinarian to determine a healthy weight range for your individual cat. They can help you determine if your cat is at a healthy weight, and they can recommend a diet and exercise plan to help your cat stay healthy.