The most effective way to cool down a dog after it has a fever is of course physical cooling, such as using a cold towel to physically cool down the dog. This is the fastest and most practical method.
Cooling can only slow down the fever symptoms and help the dog get better. If the dog has a serious fever, physical cooling can only slow down the symptoms without causing symptoms. Until the therapeutic effect is obvious, to treat fever, you still need to give the dog antipyretics to cure it, or give the dog an antipyretic injection to reduce the fever. Generally, the most commonly used method is to give the dog Winoan, a fever-reducing drug, or send it to a pet hospital for medical treatment.