1929 was the start of the Great Depression, and one of its many effects was the severe dropping off of registrations as fewer dogs were bred. This affected the Tervueren as well, the 1929 LOSH listing only 7 individual registrations and two litters. In that same year Mr Thuriot began his Bois des Capucins kennel in Tervueren, choosing as his foundation bitch Mira du Bois des Capucins, of unknown origins.
1931 saw the birth of Sarra du Bois des Capucins in Mr Thuriot's kennel in Tervueren. Her sire was Sultan du Colzas LOB 12438, an older brother of Elan, her dam Mira du Bois des Capucins from unknown origins. Hist of the Terv p22