1. Dogs don't eat, are inactive and tremble, which may be due to the weather or not keeping warm in time after bathing, resulting in a cold and fever.

2. The first owner can take the dog's temperature with a thermometer. The measurement method is to insert a thermometer into the dog's ass and measure the rectal temperature, because the rectal temperature is the most accurate.

The normal temperature of dogs is 35 ~ 39℃. Observe whether the dog's temperature is higher or lower than the normal temperature.

4. At the same time, you can observe whether the dog is accompanied by vomiting, diarrhea and other abnormalities. If accompanied by vomiting, diarrhea, bloodshot feces, and the body temperature continues to be high, occasional convulsions may cause dogs to be infected with bacteria and viruses.

5. also observe whether there are bloodshot and worms in the dog's feces.

6. If there are bugs and bloodshot feces, and the dog is getting thinner, then the dog may be infected with parasites.