It's absolutely crucial to contact your veterinarian immediately. They are the only ones who can accurately assess your puppy's weight and determine the correct dosage and type of dewormer.
Here's why it's dangerous to self-medicate:
* Dosage: Giving the wrong amount of medication can be harmful, even fatal, to your puppy.
* Type of wormer: There are different types of wormers for different types of worms. Your vet needs to know what kind of worms your puppy has to prescribe the right medication.
* Underlying health issues: Your puppy could have underlying health conditions that make certain medications unsafe.
Please don't hesitate, contact your vet right away. They will be able to safely and effectively treat your puppy.