How long after external deworming medicine can a dog be bathed?
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Expert Answer
After a dog uses external deworming medicine, it is best to wait a week before bathing, at least 3 days apart. The medicine needs to slowly penetrate the whole body through the sebaceous glands, a process taking about 2 to 3 days.
If the dog is bathed shortly after deworming, it will reduce the medicine’s absorption and affect its efficacy, leading to incomplete deworming. Therefore, to avoid affecting the result, the owner should bathe the dog one week after applying the medicine.