In doing Lightworker Healing Protocol work on animal clients, is it important to request Soul Matrix Healing for the negative consequences to others and returning to the self of any high-level psychic attacks they have launched?

Even though these are animal clients being worked on, it is nonetheless important to consider this possibility. This is all a matter of degree. Whether the intention of the animal directing negative emotion and intention towards a person meets the energetic threshold of a high-level attack or not, the meaning of the request is clear to the divine realm, that when there is more than an idle moment of annoyance but rather a concerted focusing of negativity towards humans, this can rise to the equivalence of a high-level psychic attack that means harm and wants impairment if not destruction of the target. You certainly get this feeling when confronted by a snarling dog barking ferociously because you are present on their territory, or they take a disliking to you when you encounter them on the street, for example. That ferocity is a quite intense and high-level energetic attack, and therefore the request in the Soul Matrix Healing of animals is very appropriate to include.