Pregnant cats panting heavily may be a sign that they are about to give birth. They usually also have symptoms such as loss of appetite and body trembling. Cats may also pant severely when the weather is hot, have asthma, or have heart disease. The owner may find that the cat is abnormal. If necessary, take the cat to the pet hospital for examination and treatment immediately to avoid worsening of the condition. When the weather is hot, you can prepare clean water sources and cooling mats for cats to help them cool down.