Ponies are Baby Horses

I caught a second ride on Lizzy Friday morning- just a quick hack. I showed the photo to Paul and he asked if she was really wild. Nope- Lizzy is 23 years old- she fell asleep in the cross ties.  

Paul looked a little discombobulated and when I asked why he told me that he was surprised by Lizzy's age since he thought that ponies were just young horses that hadn't grown up yet.