Well.. i did a spell to find it out, this one -
Before you go to bed write in a notebook or dream journal this incantation:
"Guardians of the dream world,
I call you to my side.
Reveal my spirit animal,
my protector and guide.
Show me the power, beauty, and grace
In the radiant eyes if my guardian's face."
It was yesterday when i did it, and i seriously dreamed about a wolf protecting me from people that where yelling at me.. Your spirit animal may come to you in a dream or if you happen to run into a certain animal more than once and it does not come to you in a dream; it's most likely that is your spirit animal.
It may take time for you spirit animal to appear to you in a dream. Personaly i did it yesterday night and i dreamed about it that night. So.. Goodluck my Friend!! :)