The dog that plays the adult version of Bella is named Shelby and she was a rescue dog. She was found living in a junkyard in Tennessee.Despite the title and having the same book author, this will not be a sequel to 'A Dog's Purpose'. However, Universal Pictures is planning to release a sequel to that film titled 'A Dog's Journey' scheduled to be released the same year as this film.The wolves in this film are really coywolves which are a wolf-coyote hybrid. Regular wolves that inhabit northwestern American states (including Alaska), northern portions of the Great Lakes region and Canada are gray/grey and white while coyotes have brown, tan, gray/grey and white fur. Coyotes that are partially wolves inhabit northeastern American states and eastern Canada.