They are generally mouse-like in appearance, but with furred, rather than scaly, tails. Their broad hind paws which are furred underfoot were referred to as doekvoetjie . The ears are thickly furred on the edges, though naked on the inside. The whiskers are long and black, and the feet are fully furred and buff-coloured. The uropatagium and forearms are sparsely furred. Animals of this region were also thickly furred, supporting the dependence on fur trading. The basal upper half of its tail membrane is densely furred. They are born blind and are sparsely furred with white hair. Its summer coat is short, sparse and coarse, and the tail is sparsely furred. Due to this long pregnancy, chinchillas are born fully furred and with eyes open. Pups are altricial and sparsely furred at birth, so dependent on their mothers for care. Robes made from the furred hide of a bison were often worn in winter. Field-bred dogs tend to have shorter, coarser coats than the longer furred show-bred dogs. Its entire body is densely furred, including its uropatagium. At birth, the North American river otters are fully furred, blind, and toothless.