Check for a rectal temperature of 103°F (39.4°C) or higher
Look for warm ears, paws, or body
Notice lethargy or low energy
Watch for shivering or trembling
Observe loss of appetite
Check for panting when not hot or active
Look for red eyes or a runny nose
Notice coughing, vomiting, or diarrhea
Watch for signs of discomfort or pain
Seek veterinary care if the temperature is 104°F (40°C) or higher or symptoms are severe