Opening quotes are routinely double the going rate. If you do it, negotiate down to roughly ₹500/person and skip the extra ₹100-200 'telescope view' and animal-photo upsells unless you actually want them.
Horse and pony rides became a practical necessity in Kufri because motor vehicles cannot reach several of its steep, narrow viewpoint trails, including the path to Mahasu Peak, making mounted transport a decades-old local tradition rather than a purely touristic invention. Yak rides, offered mainly around Indira Tourist Park, reflect Kufri's cultural proximity to Himalayan and Tibetan pastoral traditions where yaks are traditional pack and riding animals at altitude. Both activities evolved from working transport into one of Kufri's signature visitor experiences over the latter half of the 20th century.