When the pet has an increased body temperature or fever that can be recurrent. A body temperature of at least 103.5° F (39.5° C) is considered a fever. A fever is a response to a disease or threat. As with humans, a fever is beneficial for the dog or cat\'s immune system. However, if the fever goes on for an extended period of times, it is advised to consult a veterinarian as a medical treatment might be needed.
How to Recognize
A pet\'s normal temperature is usually between 100 and 102.5 F. Pets are considered to have a fever above 103 F, and fevers above 106 F can cause permanent damage to your pet and its organs. Shivering, vomiting, and fatigue are common signs that your pet may have a fever.
It is normal for your pet to run a low-grade fever within 2 days of receiving a vaccination. A fever may be a sign that your pet is trying to get toxins out of its body or is fighting an infection.
If your pet has a fever above 103 F, you should call your veterinarian. If your pet is running a fever above 106 F, seek emergency care for your pet immediately.