Dogs can be dewormed externally three days after taking a bath. First of all, most external deworming drugs for dogs are diffused through skin glands, and the oil on the skin can help deliver the deworming drug. Therefore, it is recommended that there be a certain amount of oil on the dog's skin three days after bathing before external deworming. In addition, after external deworming of dogs, it is necessary to wait for at least three days before taking a bath, because the drug usually takes effect after 24 hours of diffusion.

What should be paid attention to when deworming dogs externally:

1. The time of deworming. For puppies, external deworming can be carried out when they are 6 weeks old (after weaning).

2. Deworm pregnant dogs. Pregnant female dogs should not take anthelmintic drugs casually. It is best to consult a veterinarian when using the drug, because improper use of the drug may harm the health of the fetus and even cause stillbirth or miscarriage.

3. Frequency of deworming. Most dog-raising families generally consider deworming their dogs once a month or so for dogs that love to play outside.