Is there a particular animal, bird, insect or reptile to which you feel closely associated. Have you ever had a strange encounter with an animal etc. What animal are you most afraid of - this could be your shadow totem. Have you ever been attacked by an animal - this could be a spirit totem testing you. Every animal has its own power or speciality.
Power animals are usually wild and occur repeatedly throughout a persons life.
Domesticated animals or pets can be your link to their wild counterpart and thus your true power animal. It is said that the animal chooses the person thus preventing the human ego from getting in the way - causing people to choose only those nicer more fashionable creatures. Better to be good at sparrow magick than struggle with the power of the eagle. Imagine it standing before your drawing close to you. Practice visualizing it merging into you.