A dog card can combine with other dog cards to create a new dog. There are two types of dog cards which are male and female. Along with gender, dog cards also have different rarities and breeds that will decide the feasibility of the combination. For clarification, the hybrid requires two dog cards of the opposite gender while having the same species. Dog cards that do not meet the requirement cannot make the combination happen. Once the combination successfully occurs, a newborn dog would come to say hello to the owner. However, dog cards used in the process will disappear from the inventory after being successfully combined.