Thunderbolt is a registered quarter horse gelding. Thunder came to me with less then 30 days training on him. Ive been working with him for a month and a half now. He is very happy to have someone to work with him. I was surpised how eager he was to learn and his will to impress. Ive worked with thunder in an Indoor, outdoor and on trails. Hes really starting to collect himself and use his entire body through his different gaits. Thunder does a great job of listening to his rider and correcting his mistakes. I believe he will make a very dependable horse. Thunder also has some impressive bloodlines. http://www.allbreedpedigree.com/otoes+triple+skipper