When do British Shorthair cats develop fuller cheeks? What should they eat to help them develop fuller cheeks?
Kittens usually start developing their cheeks around 5-6 months old, but some kittens develop them later, perhaps not until around 1 year old. During this period, owners should supplement their kittens' diet with high-quality protein and fat. Owners can try the following methods. 
1. Choose the right staple food
A cat's main food is very important. When a cat is developing jowls, the owner should not be tempted to feed it loose or cheap cat food. Such cat food will not only fail to help the cat develop jowls, but may also cause health problems. It is recommended to choose some low-salt organic cat food.
2. Prepare complementary foods
To help your cat develop fuller cheeks, you should prepare supplementary food for them, such as beef, lamb, duck, chicken, fish, shrimp, and egg yolks. However, all of these should be cooked before feeding them to your cat. You can also supplement your cat's diet with some extra nutrients, such as adding some "Yuandumiao" (a brand of supplements) to their regular food for a combination of food and nutritional supplements.
3. Pay attention to getting adequate rest.
After feeding and watering your cat well, let it rest properly. Provide it with a comfortable, warm, well-ventilated, quiet place to rest. This will help it develop its cheeks. Also, take your cat out to bask in the sun more often.