http://www.newslab.ru/interv/220467 - article in Russian from May this year. It is about a circus dinasty - family Zapashnyi, who dedicated their lives to circus for the last 100+ years. For the last 20 years, Maritsa Zapashnyi, animal trainer is working with Black panthers and last 10 years with Caucasian Ovcharkas. I think it is cool.