Each dog is associated with a specific rarity that determines its basic stats, the number of skills, and growth rate. There are 4 rarities: Common, Rare, Epic, and Legendary. Dogs of higher rarity will have a faster training process as well as better stats gained. The number of skills also varies depending on the rarity of the dog ranging from 1 to 4 skills. To clarify, Common rarity has one skill, Rare has two skills, Epic has three skills, and Legendary has four skills.