1. Vocal problem: For some reasons, such as damaged vocal cords or health problems, a dumb cat can't make a normal meow, but will make a hoarse, silent or almost inaudible weak sound.
2. Tongue problem: Mute cats sometimes stick out their tongues and keep them out of their mouths, but not every dumb cat has this behavior, which may depend on their health or individual differences.
3. Behavior: Mute cats are usually as active as other cats, but because they can't communicate by voice, they may use other ways to express their feelings and needs.
4. Stickiness: Dumb cats may prefer to be close to people, because they need human companionship and care to meet their emotional needs.
In a word, dumb cats are a very special kind of cats. Although they can't make a sound, they can also be family pets, and they are as gentle and lovely as other cats. We need to pay more attention to the diseases and daily health care of dumb cats to help them get a healthier and happier life.