In order to get rid of intestinal parasites, most of them have to start before Chihuahua has not been injected. At present, there are comprehensive insect repellants, which can solve all internal parasites at one time, which is very convenient . Insects should be as clean as possible, so as not to affect the effect of the vaccine. In general, puppies are dewormed when they are young, and they still need to be dewormed every six months to a year in the future to avoid worms that slip through the net. It is likely that they have not ovulated during deworming, and it is not easy to be detected. Common parasites in dogs are: :

1. Ascaris - beige, like a rubber band, parasitic in the intestines, absorbing digested nutrients. You can check whether there are eggs in the stool to know whether there are roundworms in the stomach. Many female dogs are not dewormed before pregnancy, so that the puppies are contaminated during pregnancy, so that the puppies have worms in their intestines after they are born. The worm body will be corroded by stomach acid when eaten, but the round worm eggs with thick egg shells will not be destroyed; when the puppy sucks, it accidentally licks the feces of the bitch containing the worm eggs, and the worm eggs escape the stomach acid , hatch into adult worms in the intestines. stray dogs outside and puppies from breeding places with poor hygiene conditions are likely to have roundworms in their stomachs.

2. Tapeworms—the worms are like flat noodles, with segments, and each piece grows in strings, parasitic in the intestines to absorb nutrients. After each piece falls off, the head will grow forward again, bite the intestinal wall of the dog, and slowly grow a long string backward. If you see a worm that moves like a maggot in your puppy's feces, it's a worm. The festivals gather near the puppy's anus, making the puppy's anus so ticklish that it sits on the ground and grinds, like a slide. And because the tapeworm sucked the nutrients out of the intestines, the puppy quickly became hungry and devoured the food. It is not easy to see the eggs in stool examination, so the diagnosis must be made by the owner's careful observation. The worm is transmitted by fleas, so flea-bearing puppies are almost bound to have tapeworms.

3. Hookworms - parasitic in the duodenum, also known as duodenal worms. The worms are small and have thin hooks on the head, which bite the intestinal wall to suck blood, causing bloody stools, black stools, and anemia. Fecal examination can reveal oval eggs.

4. Trichuris - tiny whipworm body, parasitic in the cecum and large intestine, causing diarrhea. Fecal examination revealed oval eggs with small caps at both ends, which are now rare.

5. Coccidia - like eggs as large as white blood cells, parasitic on the small intestinal moving membrane and cells, causing diarrhea. It is also easy to co-infect with coccidiosis. Invisible to the naked eye, and the coccidia have two generations: the sexual and asexual generations alternate to hide in the epithelial cells, which is very troublesome to expel; but it is not a big worry to be infected after the dog becomes an adult, because the adult dog's body will produce a considerable amount of worms. antibodies to destroy.

6. Heartworms - adults are like fine rice flour, parasitic in the right ventricle and adjacent large blood vessels, and are transmitted by mosquitoes. When a dog is bitten by an ant containing infected larvae, the worms travel with the bloodstream and eventually return to the right ventricle to grow and thrive. After seven months, it grows into an adult and begins to produce tiny larvae, which spread throughout the body with blood, and often reside in the liver and kidneys, which are covered with tiny blood vessels, causing serious obstacles. Adult worms gather more and more in the right ventricle, up to 300, which not only enlarges the right ventricle, but also causes the blood of the liver to not return to the right heart completely, resulting in hepatomegaly, followed by a large amount of ascites. And too many worms will also run to the lungs, forming a blockage. The dog becomes tired easily, loses weight, coughs shallowly, and pants after exercise. Sometimes the adult worms may also travel all over the body, causing local thrombosis. The nymphs hide in the coronary arteries that supply the heart with nutrition, which can easily make the dog's heart unbearable and die of shock. At present, the infection rate of stray dogs in the wild is more than 30%, that is, one out of every three dogs has heartworm. Fortunately, the current testing technology is developed, a little blood is collected, and the result can be obtained in two minutes. There are effective medicines for treatment, and preventive medicines that are taken orally on a monthly basis are available for convenience.