To get rid of intestinal parasites, most of the time you have to start before the Chihuahua is vaccinated. There are now comprehensive dewormers that can eliminate all internal parasites at once, which is very convenient. The insects should be driven away as much as possible so as not to affect the effectiveness of the vaccination. Generally, puppies have been dewormed when they were young, and they still need to be dewormed every six months to one year to avoid bugs slipping through the net. It is likely that they have not ovulated during the deworming and are not easy to detect. Common parasites that live in dogs are: :

1. Roundworms - beige, like a rubber band, parasitic in the intestines, absorbing digested nutrients. You can tell whether you have roundworms in your stomach by checking your stool for eggs. Many female dogs are not dewormed before pregnancy, which leads to contamination of the puppies during pregnancy, resulting in worms in the intestines of the puppies after they are born. The worm body will be corroded by gastric acid when eaten, but the round worm eggs have a thick egg shell and will not be destroyed; when the puppy is sucking milk, he accidentally licks the female dog's feces containing worm eggs, and the worm eggs escape the stomach acid. , hatch into adult worms in the intestines. Most stray dogs outside and puppies from breeding places with poor hygiene have roundworms in their stomachs.

2. Tapeworms - The tapeworms are like flat noodles with segments, which grow into strings and parasitize in the intestines to absorb nutrients. After each piece falls off, it will grow its head forward, bite the dog's intestinal wall, and slowly grow a long string backward. If you see maggot-like moving worms in your puppy's feces, they are stripworms. The fragments gather near the puppy's anus, causing the puppy's anus to itch so much that it sits on the ground and grinds, like a slide. And because the tapeworm violently sucks out the nutrients in the intestines, the puppy becomes hungry very quickly and devours food voraciously. It eats a lot, but remains skinny. It is not easy to see eggs in fecal examination, so diagnosis requires careful observation by the owner. This tapeworm is transmitted through fleas, so puppies with fleas are almost inevitably infected with tapeworms.

3. Hookworm - parasitizes in the duodenum, also known as "duodenal worm". The worm has a small body and a thin hook on the head. It bites the intestinal wall and sucks blood, causing bloody stools, black stools, and anemia. Oval-shaped eggs can be seen on fecal examination.

4. Whipworms - tiny whipworms that parasitize in the cecum and large intestine, causing diarrhea. Fecal examination shows oval-shaped eggs with small caps on both ends. This kind of worm is now rare.

5. Coccidia - eggs that are as big as white blood cells and parasitize on the moving membranes and cells of the small intestine, causing diarrhea. If your puppy is infected with this parasite, you must pay attention because it is easy to be infected with coccidia during canine distemper. . It is invisible to the naked eye, and there are two generations of coccidia: the sexual generation and the asexual generation alternate and mostly hide in epithelial cells, which is very troublesome to get rid of. However, there is no need to worry about infection after the dog becomes an adult, because the adult dog's body will produce quite a lot of coccidia. of antibodies to eliminate.

6. Heartworms - Adult worms are like thin rice noodles, parasitic in the right ventricle and adjacent large blood vessels, and are transmitted through mosquito vectors. 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, the worms grow into adults and begin to give birth to tiny larvae, which spread throughout the body with the blood, often settling in the liver and kidneys, which are covered with small blood vessels, causing serious obstacles. The number of adult worms gathering in the right ventricle, up to 300, not only enlarges the right ventricle, but also prevents the blood from the liver from completely returning to the right heart, resulting in hepatomegaly, followed by the production of a large amount of ascites. Excessive worms can also travel to the lungs and cause obstruction. The dog becomes tired easily, loses weight, coughs lightly, and becomes panting like a cow after exercising. Sometimes the adult worms may travel throughout the body and cause local blood clots. The nymphs hide in the coronary arteries that supply nutrients to the heart, which can easily cause the dog's heart to be unable to withstand it and cause shock and death. Currently, the infection rate among stray dogs in the wild is over 30%, which means that one out of every three dogs has heartworm. Fortunately, testing technology is now so advanced that you can get the results in just two minutes by taking a little blood. There are specific medicines for treatment, and for prevention, there are preventive medicines that can be taken orally every month, which is extremely convenient.