The reasons why guinea pigs shed hair: 1. It may be that guinea pigs are nervous after being frightened, so they lose hair. 2. Guinea pigs may lose hair due to normal nutrition. 3. There may be potential skin infections. 4. It may be that endocrine problems cause hormonal disorders, causing hair loss in guinea pigs. 5. If there are no abnormalities on the skin, but simple hair loss, it should be considered that it is caused by the normal molt of the guinea pig.

Treatment methods for guinea pig hair loss:

1. If it is due to trauma. Observe whether there is still bleeding. At this time, you need to pay attention to treating the wound, pay attention to nutritional supplements, and promote wound healing.

2. If there is hair loss in a localized area, and there is more hair toward the middle, it may be caused by fungal infection, and the guinea pig needs to be treated with antifungal drugs.

3. If it is caused by mite infection, large indurations will appear on the skin of the guinea pig, and the areas where the hair falls will be relatively hard. At this time, mite removal drugs need to be used.

4. It is recommended that pet owners should not give medicine to guinea pigs without authorization. They should take guinea pigs to the pet hospital and use the medicine correctly under the guidance of professional doctors.

5. If there is no abnormality on the skin, but simple hair loss, it should be considered that it is caused by the normal molt of the guinea pig.