Sign 1:
The dog is constantly itching or shaking its body. This may be caused by lice, fleas, scabies mites.
Sign 2:
The dog has scabs, pustules, and even hair loss. This is most likely to be infected with scabies mites.
Sign 3: When combing the dog's hair, small black particles were found. After the particles dissolved in water, they were blood-colored. This is ironclad evidence of flea infection.
Sign 4:
The dog suddenly became thinner and its ribs were very obvious. This may be infected with tapeworms, roundworms, hookworms and other in vivo parasites.
Signs 5:
Dogs often cough or breathe rapidly. This may be infected with heartworm or toxoplasma gondii.
Sign 6:
The dog's vomit was found. This is likely to be infected with roundworms.
Sign 7:
The dog has pulled out black stools, bloody stools, or white particles and insect bodies in the stool. This may be infected with hookworms, whipworms, coccidiosis, roundworms, and tapeworms.
Sign 8: The dog's gums and eyelids are very pale, which means that the dog is anemia and may be infected with some internal parasites.
Sign 9:
Dogs often rub their butts on the ground, and they are extremely itchy. This is very likely to be a tapeworm being responsible!
In fact, if a dog has parasites, it may not necessarily have obvious symptoms, so it is very necessary to deworm regularly for the health of the dog!