A dog is considered to have a fever when its body temperature rises above 103°F (39.4°C). Normal body temperature for dogs is between 101°F and 102.5°F, which is naturally higher than humans. To accurately know if a dog has a fever, the best way is to take its rectal temperature using a digital thermometer. Signs that may indicate a dog has a fever include:

• Red or glassy-looking eyes
• Warm ears and/or nose
• Shivering or trembling
• Panting
• Runny nose
• Decreased energy or lethargy
• Loss of appetite
• Coughing or vomiting

Feeling the dog's nose alone (whether wet or dry, hot or cold) is not a reliable method to determine fever. If the dog's fever is 106°F or higher, it is considered a high fever and may require immediate veterinary attention. If a fever is confirmed, keep the dog hydrated and monitor for other symptoms, but never give human medications like ibuprofen or acetaminophen, as these are toxic to dogs.