- Heartworm. Mosquito bites cause heartworm to exist in a dog and will reside in your pet's heart and nearby blood vessels. A dog infected by heartworms looks dull and may even have a chronic cough. If possible, ask your veterinarian if your dog could be given a heartworm medication when it is the season of mosquitoes.

- Hookworm. Hookworms can be given by the mother dog to a puppy during the nursing period or even before birth. Hookworms cause dog anemia and appetite loss.

- Roundworm. The transmittal of roundworms is very much like how hookworms get transmitted in a dog. An infected dog usually has a potbelly. Roundworms cause pneumonia, diarrhea, dehydration, stunted growth, and vomiting.

- Tapeworm. A dog gets tapeworms if it swallows fleas that are larvae-laden. Much of the symptoms that are obvious rarely show, but in the dog's feces, you could see deposits of a rice-like appearance. - Whipworm. A dog infected with whipworms may have diarrhea and other ailments like, stool mucus, and serious bowel inflammation. Extreme weight loss is also a symptom caused by whipworms.

- Fleas. Fleas, the commonest among external parasites, cause the dog to continuously scratch various parts of the body. This results to fur loss. Ask your veterinarian on a good flea-control program, since fleas could become resistant to some products over time.

- Lice. Lice can infect less common compared with fleas. Plus, they can be controlled easier.

- Ticks. Ticks can pose more serious problems than fleas because diseases like Rocky Mountain Spotted Fever, or Lyme disease, can be contracted with ticks. Tweezers can be used to remove ticks one by one. If you do not know how to remove ticks properly and carefully, ask your vet first. If you do know how, ticks should be placed in a can with soap and water. Treating dog diseases

Some ways of treating dog diseases that your vet might use:

- Pills

- Liquid medicine

- Eye drops and ointment

- Ear drops and ointment

With proper care and prevention, your pet dog will be generally free and safe from various diseases. If you notice something's wrong with your dog or he is acting strangly, immediately consult with your vet.