The dog sticking out its tongue and panting may be caused by overheating, just after exercise, stress reaction, or lung disease. You need to observe whether the dog has other abnormalities. If the dog is normal, , then you can feed the dog some water to let the dog relieve itself; if the dog has difficulty breathing, vomiting, poor energy, etc., it is best to send it to the pet hospital for examination and treatment immediately to avoid delaying the condition.