Once a cat becomes sick, it will most likely develop a fever. Therefore, once you find that a cat has abnormal behavior, you must first take the cat’s temperature. The normal body temperature of cats is slightly higher than that of humans, generally maintained at 38 to 39 degrees Celsius. This is why humans feel warmer when they hold a cat in their arms. The standard and correct way to take a cat's temperature is at the anus. But if the cat struggles strongly and objects, you can also measure it under its armpits or at the base of its hind legs. Choose a fixed place to measure to understand the cat's body temperature in a healthy state.

When a cat has a fever, even the tip of its tail and ears, which are usually cold, will become hot, and it will collapse on the cold floor exhausted. At this time, even without taking the temperature, you can see that it has a fever. If the cat's body temperature exceeds 40 degrees Celsius, it should be sent to the hospital immediately. This may be a bacterial infection caused by the cat's imperfect immunity, or an infectious disease such as Toxoplasma.

If the cat only has a low fever but is always listless, this is mostly an early stage of high fever and you must pay attention to it. In addition, if a cat has pus somewhere on its body, it will also cause a low-grade fever. If a cat loses its energy source or has an abnormal metabolic process, its body temperature will be lower than usual. This is a sign of terminal illness and must be sent to the hospital immediately.