Cats generally develop gills on their own when they reach a certain age. At this time, you need to supplement protein for the cat and feed some foods with high protein content, such as chicken breast, beef, egg yolk, etc., to prevent the cat from being malnourished and unable to develop gills; secondly Changing the cat's food to larger grains can exercise the cat's masseter muscles and promote cheek hair.
Tip:
Under normal circumstances, cats’ cheeks are caused by genetic inheritance, and not all cats will have cheeks.