The reasons why a usually lively cat suddenly becomes wilted:

1. The usually lively cat suddenly becomes wilted, which may be due to eating spoiled or toxic food, which causes the cat to appear. Symptoms of gastrointestinal discomfort, the cat will become wilted at this time.

2. It may also be due to depression and sudden wilting. If the cat stays indoors for a long time and no one plays with it, its psychology will become unhealthy.

3. If the cat goes in and out of an environment with a large temperature difference, the cat may also catch a cold. Cats usually also have symptoms of runny nose and cough.

The solution to a normally lively cat that suddenly becomes languid is:

1. Cats will show symptoms such as listlessness and loss of appetite after getting sick. It is recommended that the owner take care of the cat in time. The cat should consult a pet doctor, conduct corresponding examinations based on the cat’s symptoms, and take treatment measures.

2. When the surrounding temperature is too high, cats will be reluctant to move, often lie down, and have poor appetite. The owner only needs to provide the cat with sufficient drinking water and lower the indoor temperature appropriately, and the cat will return to normal.

3. If the cat suddenly languishes due to depression, the owner should take care and adjust the cat according to the cat's state in combination with medication and physical or psychological treatment.