The reason why a cat has a hoarse voice but looks healthy:
1. The cat's voice became hoarse due to stress reactions such as anxiety.
2. The cat may have a respiratory illness, a mild cold, or be experiencing heatiness, causing discomfort in its throat and resulting in a hoarse sound.
3. The cat suffers from digestive tract disease or parasite infection, and vomits continuously, causing its voice to become hoarse.
4. Cats may also develop hoarse voices when they are not used to a new environment. 
5. The cat's stomach is upset and it has indigestion, so it keeps gagging, which makes its voice hoarse.
6. When cats are in heat, their voices change and they meow incessantly. If they meow too much, their voices will become hoarse.
7. A foreign object that irritates the cat's throat can cause hoarseness.
8. Sometimes cats are too lazy to make noise or make very quiet noises.
9. Cats may experience seasonal anorexia and hoarseness.
10. If it is a kitten, its organs are not fully developed, which may cause it to be unable to make a sound.
11. Some cats are born with a hoarse voice.
If your cat has a hoarse voice but seems healthy, you should pay attention:
1. If your cat has a cold, you can give it a small amount of Banlangen or Amoxicillin, the same amount you would give a child. If it has other illnesses, you should take your cat to a veterinary hospital.
2. If your cat has indigestion, you can grind yeast tablets into powder and put them into your cat's food, and encourage your cat to drink more water.
3. If your cat is infected with parasites, you should deworm it. You can add minced garlic to its food.
4. If your cat is experiencing heatiness, make sure it drinks plenty of water and gets plenty of rest.
5. If there is a foreign object in the cat's throat, the owner should take the cat to a veterinary hospital for examination.
6. Owners should respond to their cats' constant meowing, otherwise the cats' voices will become hoarse after a while.
