Would it be of value to invite all the animals in the light to both add their intentions for healing and to join in as healers along with the Lightworker Healing Protocol sessions of our practitioners as a way to augment the healing outreach?

Both things would be advantageous, as is true with respect to all the other beings you are adding. The animals vary in their ability to do healing work on human, but this is best left to the divine realm to sort out, so you can make a broad request and know that significant additional healing impact will result.