Cats may dislike a few things, such as loud noises, sudden movements, and unfamiliar objects. Cats may also dislike being held for too long or being petted in certain areas, such as their bellies. Additionally, cats may be scared of other animals or strangers, so it is important to introduce them slowly and in a controlled environment. To make a cat happy, it is best to provide them with a safe, comfortable home, plenty of playtime, and regular affection.