Is Fenbendazole 444 Mg Safe for Puppies? Fenbendazole is a widely used deworming medication for dogs and other animals. It belongs to the benzimidazole class of antiparasitic drugs and is commonly recommended by veterinarians to treat intestinal worms. Many pet owners ask whether Fenbendazole 444Mg Tablet is safe for puppies, especially when young dogs show signs of worm infections such as diarrhea, bloating, poor growth, or low...