Following his retirement from racing Mundig stood as a stallion, with his stud fee in 1839 being 10 guineas. He reportedly became a very difficult and dangerous horse during his time at stud and was responsible for at least one death. Mundig's early progeny were disappointing runners and in 1843 he was sold for 400 guineas to Captain von Kotze, a Prussian breeder. He was exported and stood from 1844 to 1848 as a stallion at the Hauptgestüt Trakehnen stud in Germany. Mundig was then sold to another German breeder called van Saucken and died in 1852. One of his British foals, The Grey Prince was standing as a stallion at Badminton in 1865 as a sire of hunters.
