Physical weakness or weight loss, physical symptoms, often scratching the body.

1. Body weight loss or weight loss: If hamsters are found to lose weight obviously or lose weight, there may be parasites in their bodies.

2. Physical symptoms: If the hamster is found to be in poor mental state, or other symptoms, such as cough, dyspnea, redness of the skin, etc. , are caused by parasitic infections.

3. Scratch your body often: If you find that hamsters often scratch their bodies, it means that they have ectoparasites.