Under normal circumstances, dogs can be dewormed internally and externally at the same time. However, if both internal and external deworming are pills, it is best to take them at a staggered time to avoid discomfort for the dog. If external deworming is done with drops or sprays, The doses can be administered at the same time. It is best to choose drops for external deworming, which are more effective and safer. Pay attention to the drops where the dog cannot lick them. You can also wear a hood for the dog.