Beaphar Wormer One Dose Dogs. This amazingly quick & easy one day treatment kills all common species of roundworm & tapeworm found in domestic dogs to leave your dog feeling healthy & parasite free. Dosage: Give 1 tablet of the Beaphar Wormer One Dose for small dogs & puppies per 2kg bodyweight. Give 1 tablet of the Beaphar Wormer One Dose for medium or large dogs per 10kg bodyweight.