Here are some steps you should take:
* Bring a fresh stool sample to your veterinarian, or use a home fecal occult blood test, to confirm the presence of worms. The exact treatment will depend on the type and extent of the worm infestation.
* Administer a dewormer recommended by your veterinarian. This will kill the adult worms and prevent them from reproducing, and prevent them from further affecting puppy's health.
* Retest your puppy's stool after the treatment is complete to make sure that the worms have been successfully eliminated.
* Repeat the treatment if necessary. Some types of worms may require multiple doses of dewormer to completely eliminate them.
* Keep your puppy's environment clean, especially the area where they eat, sleep, and poop. This will help prevent your puppy from re-infecting themselves with worms.
* Practice good hygiene, such as washing your hands after handling your puppy and their feces. This will help prevent the spread of worms to you or other animals in your household.
* Talk to your veterinarian about a long-term worm prevention plan. This will help protect your puppy from future worm infestations.