The kitten sticking out its tongue and panting may be caused by the hot weather, stress reaction, heart disease, etc. If it is caused by the hot weather, stress reaction, etc., you can help the kitten cool down and comfort the kitten. Emotional and other methods can be used to alleviate the kitten's condition. If the kitten often suffers from this condition, it is best to send it to the pet hospital for examination to avoid delaying the condition.