First, read the English article below.

If the puppies in a litter have fleas, then it's almost certain that the mother will have them too. As a result, it will be necessary to treat the mother in order to avoid reinfecting the puppies. Keep in mind that if there are any other animals in the house that have come in contact with the mother dog or puppies, they will need to be treated for fleas also. Although anti-flea products can be used on the mother, it is important to be careful about the products you choose.  If the mother is still providing milk for her puppies, certain chemicals can be passed onto the puppies through the milk, which could make them sick. Therefore, it is essential that you only use prescription products designed for use in lactating mothers. Some store bought products may be marked as "natural" or "drug free", but this does not mean that they are safe for very young puppies. And even if they don't cause any negative side-effects, natural or herbal products are unlikely to be effective in getting rid of fleas. Prescription medications that contain an ingredient called selamectin (such as Revolution and Stronghold) are licensed as being safe for use in pregnant and lactating mothers.  The medication should be applied to the adult dog's skin, according to the manufacturers' instructions, and allowed to dry for several hours before the puppies are allowed to come in contact with the mother. Selamectin-based medications should only be given in the recommended dosages, and should only be administered topically. When given orally, selamectin was shown to cause foetal abnormalities in rats. There are several ingredients used commonly in anti-flea medications that should never be given to pregnant or lactating dogs. Therefore, it's important to read the label very careful or consult with your dog's vet to avoid using products containing these ingredients.  An ingredient called fipronil (which is found in an anti-flea product called Frontline) should never be used on pregnant or lactating mothers, as it has not been proven safe for... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Hiểu lý do vì sao trị bọ chét cho chó mẹ là vô cùng cần thiết. Chỉ sử dụng thuốc kê đơn, tránh thuốc không kê đơn hoặc "tự nhiên". Dùng thuốc chứa Selamectin cho chó mẹ đang mang thai hoặc cho con bú. Tránh sử dụng thuốc chứa Fipronil và Spinosad vì không an toàn đối với chó đang cho con bú.