Animal spirits do not have a specific animal spirit path for eternity.  Cats or dogs or any other animal don’t have only a cat or dog path that is for eternity their cat or dog spirit evolutionary path.  Animal spirits are no different than any other spirits with regards to evolving.  All spirits everywhere are spirits growing and evolving.  The association and incarnation into a particular animal species is only until that spirit learns what they can learn from that particular physical animal form and the associated path.  They can continue to incarnate as that species until finished with learning from being that physical form.  Then they move onto a higher level physical form and keep the spirit growth happening.

This is because each physical form – each animal, plant, reptile, etc, life form has it’s own capacity for holding a certain level of spirit consciousness.  The physical form is available for the learning and growth of any spirit at that level of consciousness.

All spirits are able to move to other physical forms if the physical form is evolved enough to hold that particular consciousness.  All spirits do not go backwards in the evolution of physical forms.  What I’m saying is that a human consciousness level spirit cannot go backwards into a less evolved physical form if they fail to learn or make mistakes.  Animal spirits are the same.  This would not allow them to learn and master that which they failed before, because those mistakes would no longer be available for them to work on.

For example, a person who fails a course in college is not sent back to High School.  A person in 4th grade that fails 4th grade is not sent back to 3rd grade, but stays in the level they’re at until they’re able to master that level.  Even if they make gross mistakes.

In addition, anyone who transfers schools before finished, and moves to a different school (or species) doesn’t have to be put back to another grade.  The “powers” in charge look for an equivalent level of placement to put the individual.  This means that if moving from one species to another offers equivalent levels of form capacity and equivalent opportunities for learning, then it can happen.

This is the same with all spirits including spirits that currently manifest as animals.  There is no such thing as a spirit that can only be a cat during it’s spiritual evolution, or a dog that can only manifest as a dog during it’s spirit evolution.  There is only different consciousness levels within evolution and different forms for those different spiritual, consciousness levels within the evolution process.  Spirits are not created to serve the needs of a particular physical form. Physical forms are created to serve the learning needs of spirits at particular levels of consciousness.

This is not transmigration of souls.  Transmigration is more often considered reincarnating from a higher form to a lower form.  If this were to happen, the spirit would not be given the  opportunity to learn from it’s mistakes, since each physical form has it’s own capacity for consciousness.

Were a higher life form to incarnate into a lower form, the lower form would not provide the capacity for the higher consciousness to address the mistakes.  A human spirit incarnating as a worm would not have the capacity as a worm to understand and learn from their mistakes.

In addition, the full human consciousness could not enter into the worm because if it tried to, it would immediately burn out the holding capacity of the physical body.  Higher levels of consciousness, or put another way, larger consciousnesses insert greater energy into the bodies than lower levels of consciousness (smaller consciousnesses).

The original view of transmigration of spirits into lower physical life forms was believed to be a way to punish an individual who purposefully caused harm to others.  But, punishment is not the purpose of life – learning and growing is the purpose of life.  What is better than punishing someone?  Helping them reach a level of understanding and learning that they no longer make the same mistakes towards others.  Punishment keeps things in the same place.  The helping process contributes to all of existence by moving all of life forward.