Anatomic and physiologic features Short legs, bright beady black eyes Large amount of skin Cheek pouches Dental formula 2( 1/1 incisors, 0/0 canine, 0/0 premolars, 3/3 molars) The stomach has 2 parts long duedenum and jejunum Brown adipose tissue Two gland in the flanks Differention of sexes Female has 5 to 6 pairs of mammary glands