Dog worms are potential health hazards for humans, too. Most dog worms cause any or all of these symptoms: diarrhea, perhaps with blood in the stool; weight loss; dry hair; general poor appearance; and vomiting. Happy Jack offer medicine to protect your pet form dog worms. Liqui-Vict 2X is the one we've all been waiting for. Simply measure appropriate amount together with food, and your pet will not even know it has taken it. Each 8 oz. bottle is good for 480 lbs. of body weight. We recommend Liqui-Vict 2X as part of your monthly preventative health care plan to eliminate internal parasites and dog worms.