Ragdoll cats thrive on animal protein. In addition to their main kibble diet, it's recommended to supplement their diet with high-protein, low-fat meats such as chicken breast, beef, fish, and shrimp. Simply boil them in water without adding any seasoning. Cut them into small pieces or mince them and remove the bones. Animal protein helps cats build muscle, making their limbs stronger and promoting the development of jowls. 
To ensure your Ragdoll cat grows healthy, soft, and shiny fur, it's essential to supplement with lecithin. You can obtain it by feeding them cooked egg yolks or salmon, or by purchasing cat-specific lecithin supplements. Especially during the peak of their coat's full growth phase, a lack of lecithin can lead to a delayed full-growth period or rough fur.
Ragdoll cats thrive on vitamins. Fruits and vegetables are rich in vitamins, minerals, and trace elements, such as carrots, pumpkin, lettuce, and asparagus. Fruits like apples, strawberries, and bananas are also good choices. Note that vegetables should only be lightly cooked; avoid overcooking to prevent nutrient loss. They can be mixed with meat to create delicious cat food.
Ragdoll cats thrive on natural cat food. Natural cat food typically uses fresh meat (chicken, duck, beef, lamb), and some even contain high-quality meats like salmon and venison. It eliminates many of the undesirable "byproducts" found in commercial cat food and avoids chemical additives, replacing them with natural vitamins for preservation. In terms of ingredients, natural cat food uses fresh ingredients, and the sourcing of these ingredients is traceable. The balanced nutrition meets the daily nutritional needs of cats.