As member of the Association of the Friesian Horse Studbook of Southern Africa, Liesie is committed to promote and preserve the Friesian Horse.

As member of the FPSSA, Perdeprag also became a member of FPS, "Het Friesch Paarden Stamboek, the oldest & second largest Friesian Horse Studbook.

Perdeprag's breeding objectives is to breed fine friesian horses with excellent conformation, capable of performing in the various equestrian sports (show driving, driving, dressage under saddle, mixed disciplines) and also suitable for recreational use, while preserving the typical breed characteristics and further reducing inbreeding.