If you have read the article The Healers Work and the Clients Prerogative and Application of different modalities before you will have a better understanding about the “mechanics” of healing.

Animals unlike people do not live primarily in an ego. Therefore the element of will can be discarded. 

An animal will respond to healing very quickly as through the healing the biological energy system is boosted and an animal by instinct will allow and approve of that. 

The animal is always positive orientated, the wild animals even more than domesticated animals are they are under our care therefore to a very high degree subject to our energy and environment.