You pinch the tendon lightly and follow it until it disappears into a major muscle group near her joint. The action made her look like she was trying to doggy paddle with her hind hooves, occasionally a fore hoof would twitch, but her hind legs did most of the work. The sight makes you grin like an idiot; it’s like controlling a puppet. You fish your nimble fingers around some more and find another. This time you roll the taut cable slowly between the digits. She kicks again.