American Curl cats typically develop fuller cheeks between 5 and 8 months of age. Since their bodies grow before their heads, their bodies are generally fully developed by the time they enter the cheek-developing stage. If you want your American Curl to develop fuller cheeks, it's crucial to time it correctly. Don't miss the optimal period for this development. 
How to make an American Curl cat have fuller cheeks:
1. Eating high-protein foods, such as chicken breast and beef, can help the cheeks grow quickly.
2. Cats will develop their cheeks on their own when they reach adulthood, and spaying/neutering should not be done too early. Male cats usually have well-developed cheeks around 2 years old.
3. Regularly pinching its cheeks can help develop them.
