Dogs often go outside, and their bodies can easily pick up external parasites. If you're not careful, these parasites can get into your home and attach to people, which is difficult to deal with. Below is an introduction on how to promptly discover parasites on your dog.　　　　White dogs are actually quite easy to check for external parasites because the parasites feed on the dog's blood. After eating, they always leave droppings, which appear as small black dots on the dog's body. If you comb your dog's fur, these dots are easy to spot. If you want to distinguish whether the black dots are just dirt on your dog or parasite droppings, it’s simple: place the small black dots in water and see if they dissolve or have a blood tint. Dots with blood color are definitely external parasite feces. In that case, you should promptly deworm your dog.　　　　As for dark and black dogs, it is not as easy to find external parasite feces. There is a tool called a flea comb, which is a very dense and fine comb. While it cannot comb out parasites from the dog's body, it can comb out the feces mentioned above. After combing, simply tap the comb onto white paper and then use the same method as above to identify whether the residue is dirt or external parasite feces—this will work fine!