The golden age for cats to develop cheeks
The prime time for a cat to develop its cheekbones is usually between 2 and 8 months after birth.
First, let's understand what "cheek development" in cats is. Cheek development refers to the process by which the fur on both sides of a cat's cheeks gradually grows fuller, forming cute, round cheeks. This not only makes the cat's face more adorable, but it's also an important stage in its growth and development.
During kittenhood, all parts of a kitten's body develop rapidly, including its cheeks. Generally, starting from about two months after birth, the fur on a kitten's cheeks will gradually become thicker. This process continues until the kitten is about eight months old, at which point its cheeks usually reach adult size and shape. 
Why is this stage considered the golden period? Because during this time, a cat's cheeks develop most rapidly, and its absorption and utilization of nutrients are most efficient. To ensure your cat develops healthy, full cheeks, owners should provide them with ample, balanced nutrition during this stage, especially foods rich in protein and fat.
Furthermore, it's worth noting that different breeds of cats may differ in the timing and extent of cheek development. For example, some naturally rounder breeds (such as British Shorthairs and Garfields) may develop noticeable cheeks earlier, while some longer-faced breeds (such as Siamese and Abyssinian cats) may take longer. Therefore, owners need to adjust their feeding strategies flexibly based on their cat's breed and individual circumstances.