Some native American traditions hold the belief that there are 9 different totem animals that will accompany one throughout their life.
My birth totem is Wolf. My family totem is Leopard. My spirit guide is Raven. My Power totem is Lion. My spirit totem is Dolphin. My clan animal is Frog. There are a few others that act as guides such as red-tail Hawk that come in and out of my life depending on the direction I am going in my life.
Animals that appear in ones life may hold a message for them and so I recommend reading the book "Animal Speak" by Ted Andrews, it is full of information on power animals / totems, animal spirits etc. and the "power", or lessons, they impart.