I have a Sinatra Song mare and my trainer raves about how there is no bottom to her. Meaning she doesn't seem to get tired. Not that she's trying to wear her out, but she's noticed after even hard workouts she feels the horse could go on and on.
I'm curious if anyone else has noticed this about their SS offsprig.
I have seen that trait in more than a few Sandro Hit descendants, but my Feiner Stern mare is the same way, and she has no Sandro blood in her. Her dam is a Pik Bube II granddaughter, though, and Sinatra Song is out of a Pik Bube II daughter. Interesting coincidence.
I ride Arabians and my Sinatra Song 4 year old is half arabian. His dam has a good mind and strong will. He has that, too. We get into fights still at this age, but he never says "I'm too tired, stop.". He's always ready to go and re-charges pretty quick, too.