| 
Dog worms are responsible for many symptoms and sickness. There are five different kinds of dog worms that can attack your dog.
These are tapeworm, hookworm, whipworm, roundworm and the most dangerous heartworm.
When your dog is infected their feces will be filled with over  millions of worm eggs. These worms are scattered all over the places  such as on the floor, sleeping places, eating pans etc. When your dog  licked off or swallowed up these worms will enter the digestive system  then hatch out and fully developed in approximately 10 days.
Dog worm symptoms
- Coughing
 - vomiting
 - diarrhea
 - low energy level
 - pot-bellied appearance
 - loss of appetite
 - Weight decrease instantaneously
 - dull coat
 
Other symptoms of dog worms that can be seen from  external such as hot and dry nose, red and scurfy pimple, irritated  condition of the skin, pale lips, watery in the eyes, gums and foul  breath.
Types of dog worms and symptoms in detail.
Roundworms
Roundworm is the common type of worm that can be found inside most dogs and they are divided into two main types.
Toxocara canis
Parasitic worms or helminth parasite that feed and live inside the  intestine of their host causing nutrient absorption problems which can  further leads to weakness and disease. Toxocara canis are white and  yellow in color. Adult worm can have the size ranging from 9 - 18  centimetre.
Toxascaris leonina
Toxascaris leonina are usually found in feces and vomit remain of the  animals. When toxascaris leonina eggs are ingested, they will hatch  inside small intestine of their host. After fully growth and molt, they  will return to the intestinal lumen and live there.
Toxascaris leonina absorb the nutrients from their host that can  interfere with digestion system and also damage the inner lining of the  intestine. Adult worm usually have 3-4 inches long. The adult female  worm lays her eggs which will later passed into dog feces. The eggs can  become infective after three to six days exposure in the environment.
Diagnosis
Roundworms can be detected by examining the feces for the presence of eggs.
Characteristic
Roundworms have a spaghetti-like appearance and the length of their  body can grow up to 7 inches long. Eggs of roundworms are sticky and can  easily adhere to any objects or any part of human body.
Symptoms
Infected dog may not show any signs at first but in more severe cases  may experience dull hair coats, weight loss, vomiting, diarrhea, and  develop a belly appearance. If round worms is build up in dog intestines  then there is a chance that these worms can block the path and result  in death.
Prevention
Clean up feces or any dirty objects around your backyard regularly to prevent your dog from contracting roundworms.
Roundworm can also be transmitted to human by eggs ingestion so you  should wash your hands after doing activities or before eating any food  that have direct contact such as hamberger, french fries etc.  
Treatment
Oral medication is given to puppies ar weeks 4, 6 and 8 then followed  by fecal analysis using microscope at around weeks 11-12.  Annual fecal  examine are recommended for adult dog to remove all of the asymptomatic  infections.
Veterinarian can use medications for deworming process. Medications  essentially anesthetize the worms which make them unable to grip onto  the host intestine and passes on along with the stool. Roundworms cannot  survive long in the environment. You may be surprise by their long  length and see them moving when they come out.