In personality and care requirements, American Polydactyl Cats or Hemmingway cats as they are also known, are much like any other cat. Many owners who have a 'thumb cat' have made the observation, however, that their American Polydactyl cats seem to have a more relaxed and mellow personality than other cats they have owned. These cats are quite hardy and can survive even in snowy weather.  American Polydactyl Cats adapt very well to indoor or outdoor life, or a combination of the two.  They make outgoing pets, and are reported to be affectionate and patient even towards children.

In size, American Polydactyl Cats are medium to large with bodies strong and muscular in appearance. Thumb cat head is broad, with a modified stop, and medium in size. Mitten cat nose and muzzle is medium sized and the chin has a squared appearance. The wide-set ears have pointy tips. Occasionally, American Polydactyl Cats used for stud purposes have very well developed cheeks. The rounded eyes of American Polydactyls are set at an angle, and any color or color combination is acceptable. This is true also of coat color and fur length, so long as the hairs lie close to the body.