Cian O'Connor has strengthened his string of horses with the 9-year-old Sam du Challois. The stallion by Quaprice Bois Margot Quincy x Adam Iv'de Cote d'Or has been developed by French rider Ludovic Gaudin on behalf of the owners Haras de la Source since he was a 4-year-old to now compete at international two star Grand Prix level. 

"Sadness, joy, pride, a lot of emotions today ....." the stud writes on their Facebook page, thanking their rider for doing a great job with the horse. 

Source: studforlife.com/Haras de la Source