Power Explanation, Wolf

She looked down at the wolf pup, who was still struggling to bite at her fingers.  She let it go, waited until it tried to attack her again, and pushed it down onto its side once more.

“Little bastard,” she smiled.

Almost without thinking about it, she used her power.  Just the smallest amount.  She felt almost none of the vibrations or shudder she experienced as a visceral feedback on her power with the other dogs.  It was only when she saw his skin splitting that she realized it was actually working.  Faster, quicker, with so little of the temporary exhaustion she so often experienced on her end.

Was it easier with him?  What did that mean?