But they tend to do so as a group. What brings an animal to the point of being able to take that great step in his or her spiritual evolution is the fact that he or she has become driven less by animal instinct and more by human kindness, love, and response. Therefore, we must not assume that when such spirits do incarnate into human form, they will be savage. To do so would be very judgmental on our part. Some cultures teach that this does happen, primarily for purposes of punishment.
Spiritual evolution is ever onward and upward.
Certainly, some may sidestep things, but to consider that a human goes back into an animal body is totally false. Thus it is with our beloved pets. They come into our lives and give us such joy and companionship. They are spirit and deserve to be loved and respected as such. They look to us for spiritual guidance and nourishment.