Filling the cat with water will cause the cat to choke, because the owner does not know how fast the cat drinks water. Filling the cat with water will make the cat feel uncomfortable. If the cat struggles, it can easily cause water to choke on the lungs. Furthermore, it will leave a shadow on the cat's psychology. When the owner approaches with a needle, the cat will be afraid and run away. Therefore, do not fill the cat with water casually. It is recommended to use other methods.