How Long After Giving Birth Should a German Shepherd Be Dewormed?
Expert Answer
It is recommended to deworm the German Shepherd about one month after giving birth, because she needs to nurse her puppies and the lactation period lasts around one month. Wait until lactation ends before deworming.
Deworming a lactating German Shepherd can allow the medication to pass into the puppies through her milk and cause poisoning. Therefore, deworm her only after she finishes nursing to avoid harming the puppies.
If she is severely infected with parasites during lactation, you may need to wean the puppies early and feed them with formula milk as a substitute.