He was born Vital-Léandre Dumouchelle in Saint-Benoît, Lower Canada, the son of Jean-Baptiste Dumouchelle, in 1811 and studied at the Petit Séminaire de Montréal. He apprenticed in medicine, qualified to practice in 1835 and set up his practice at Saint-Benoît. Dumouchel took part in the Lower Canada Rebellion but was not arrested, although he was removed from his position as a justice of the peace.
Vital-Léandre Dumouchelle, born in 1811 to Jean-Baptiste Dumouchelle in Saint-Benoît, Lower Canada, studied medicine and qualified to practice in 1835. He established his medical practice in Saint-Benoît and was involved in the Lower Canada Rebellion but not arrested; he also lost his position as a justice of the peace.