It is relatively frequent that the puppies have worms - intestinal parasites - that can even have been contaminated by their mother during the gestation or nursing. These parasites can propitiate a wrong development of the dog. Also, some of these worms can be contagious to people. For all these reasons it is convenient a periodic deworm and, if it is necessary, you can identify the parasite from an excrement sample, to be able to choose the appropriate product for their control.
It is also frequent that the dogs have external parasites - mainly fleas and ticks -. The external deworm using the appropriate products will allow us to control them.