A rare pet defines a pet that has a rare or unique skin (appearance). In this case, rare or unique means the skin is only possessed by one or a very few difficult to find or acquire mobs. Since pet stats have been normalized, every pet of a particular type (i.e. cat, boar, bear, etc.) will have exactly the same movement speed, health, and attack speed. Primarily pets of one type are all the same as far as stats go. Pets learns new ranks of abilities as they go up in level. For more pet details and information on taming pets, see Pet (Hunter).