The breeding was done on small studs, but the inspection standards are very rigorous and serious for a horse to be registered in the studbook, because these animals are literally bred to trot. They also have to pass a qualification test of time. The results were five important trotter bloodlines, of whom the modern French Trotter traces.Later on bloodlines of American Standardbred was also added, to increase the speed qualities of the breed, but it didnt effect of the toughness of the French breed. One of the most admired trotting lines is the Fuchsia.
It sired approximately 400 trotters, of whom hundreds were sires of winners. The other four stallions are Conquerant, Lavater, Normand and Phaeton. The most influential stallion from the 19th century was Young Rattler. The French Trotter Stud Book was closed in 1937, but reopened recently to register crossbreeds between French Trotters and Standardbreds.