Sign 1:

The dog always itches or shakes its body. This may be due to lice, fleas, or scabies mites.

Sign 2:

The dog has scabs, pustules, and even hair loss. This is most likely due to scabies mites.

Sign three:

When I was combing my dog's hair, I found small black particles. After the particles dissolved in water, they became blood-colored. This is solid evidence that you have fleas.

Sign four:

The dog suddenly became thinner and his ribs were obvious. This could be an infection with internal parasites such as tapeworms, roundworms, and hookworms.

Sign 5:

Dogs often cough or have shortness of breath. This could be an infection with heartworm or Toxoplasma gondii.

Sign 6:

Insect bodies were found in the dog's vomit. This is most likely a roundworm infection.

Sign 7:

The dog has black stool, bloody stool, or white particles and worms in the stool. This could be an infection with hookworms, whipworms, coccidia, roundworms, or tapeworms.

Sign 8:

The dog’s gums and eyelids are very pale, which indicates that the dog is anemic and may be infected with some internal parasites.

Sign 9:

The dog often rubs his butt on the ground and is itching unbearably. This is very likely to be caused by tapeworms!

In fact, if a dog has parasites, it may not have obvious symptoms, so for the health of the dog, regular deworming is very necessary!