Check for a rectal temperature of 101.0–102.5°F
Suspect fever if the temperature is 103°F or higher
Suspect a serious fever if the temperature is 104°F or higher
Feel for a warm, dry nose
Look for lethargy or unusual tiredness
Watch for loss of appetite
Notice shivering or trembling
Check for red or glassy eyes
Look for panting when not hot or active
Watch for coughing, vomiting, or diarrhea
Check for weakness or reluctance to move
Look for signs of dehydration such as dry gums
Contact a veterinarian if fever is suspected
Seek urgent veterinary care if the puppy is very young, weak, or has a high fever