Here's why:
* Safety for Pups: Flea shampoos can be toxic to puppies, especially those that are still nursing.
* Milk Contamination: The shampoo can be absorbed into the mother's skin and potentially contaminate her milk, putting the puppies at risk.
* Other Options: There are safer and more effective flea treatments for nursing dogs, such as spot-on treatments or oral medications.
Please reach out to your vet immediately. They can advise you on the best course of action to keep both the mother dog and her puppies healthy.