Puppies often are infected through the placenta of the mother. This is why de-worming is usually begun at 2 weeks into the life of the puppy. Pets infected with roundworms usually have bloated bellies and rough looking coats. Your pet may show signs of vomiting, diarrhea, and colic. If left untreated a severe infection could damage the brain, liver, or lungs.
Hookworms attach themselves onto the intestinal lining with hook-like teeth.
As this worm feeds on your dog's blood, it moves around continually leaving bleeding sores. Bloody, mucus-laden diarrhea is an indication your dog may have a hookworm infection. This worm infection can cause anemia, weight loss, skin problems, rough coat, weakness, and impair the growth and physical development in puppies. To prevent infection of any type of worm it is important that you do not let your dog drink stagnant pond water, ingest other dogs feces, rabbits or rodents, raw meats, garbage, or bones it may find on walks. Also, do not let your pet play in possible areas infected by mosquitos or other dogs.